Home / 1,247,255,021.88-1,721,191,051.98-690,326,145.72

Finding the Fourth Proportional to 1,247,255,021.88, 1,721,191,051.98 and 690,326,145.72

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Solution

The fourth proportional to 1,247,255,021.88, 1,721,191,051.98 and 690,326,145.72 is: 952,638,525.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,255,021.88 : 1,721,191,051.98 = 690,326,145.72 : x
  2. Step 2: Convert to fraction form
    1,247,255,021.88/1,721,191,051.98 = 690,326,145.72/x
  3. Step 3: Cross multiply
    1,247,255,021.88x = 1,721,191,051.98 × 690,326,145.72
  4. Step 4: Simplify right side
    1,247,255,021.88x = 1,188,183,184,961,105,664
  5. Step 5: Solve for x
    x = 1,188,183,184,961,105,664/1,247,255,021.88
  6. Step 6: Final answer
    x = 952,638,525.50

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Half scale
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Double scale
Find fourth proportional to 1,247,255,022.88, 1,721,191,053.36 and 690,326,146.72
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.