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Finding the Fourth Proportional to 521,007.10, 781,510.65 and 254,938.30

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Solution

The fourth proportional to 521,007.10, 781,510.65 and 254,938.30 is: 382,407.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,007.10 : 781,510.65 = 254,938.30 : x
  2. Step 2: Convert to fraction form
    521,007.10/781,510.65 = 254,938.30/x
  3. Step 3: Cross multiply
    521,007.10x = 781,510.65 × 254,938.30
  4. Step 4: Simplify right side
    521,007.10x = 199,236,996,542.90
  5. Step 5: Solve for x
    x = 199,236,996,542.90/521,007.10
  6. Step 6: Final answer
    x = 382,407.45

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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.