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Finding the Fourth Proportional to 648,009.20, 972,013.80 and 448,554.80

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Solution

The fourth proportional to 648,009.20, 972,013.80 and 448,554.80 is: 672,832.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,009.20 : 972,013.80 = 448,554.80 : x
  2. Step 2: Convert to fraction form
    648,009.20/972,013.80 = 448,554.80/x
  3. Step 3: Cross multiply
    648,009.20x = 972,013.80 × 448,554.80
  4. Step 4: Simplify right side
    648,009.20x = 436,001,455,656.24
  5. Step 5: Solve for x
    x = 436,001,455,656.24/648,009.20
  6. Step 6: Final answer
    x = 672,832.20

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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.