Home / 1,242,000.30-1,863,000.45-612,144.30

Finding the Fourth Proportional to 1,242,000.30, 1,863,000.45 and 612,144.30

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Solution

The fourth proportional to 1,242,000.30, 1,863,000.45 and 612,144.30 is: 918,216.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,000.30 : 1,863,000.45 = 612,144.30 : x
  2. Step 2: Convert to fraction form
    1,242,000.30/1,863,000.45 = 612,144.30/x
  3. Step 3: Cross multiply
    1,242,000.30x = 1,863,000.45 × 612,144.30
  4. Step 4: Simplify right side
    1,242,000.30x = 1,140,425,106,364.94
  5. Step 5: Solve for x
    x = 1,140,425,106,364.94/1,242,000.30
  6. Step 6: Final answer
    x = 918,216.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.