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Finding the Fourth Proportional to 508,747.10, 702,073.71 and 317,871.20

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Solution

The fourth proportional to 508,747.10, 702,073.71 and 317,871.20 is: 438,663.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,747.10 : 702,073.71 = 317,871.20 : x
  2. Step 2: Convert to fraction form
    508,747.10/702,073.71 = 317,871.20/x
  3. Step 3: Cross multiply
    508,747.10x = 702,073.71 × 317,871.20
  4. Step 4: Simplify right side
    508,747.10x = 223,169,012,686.15
  5. Step 5: Solve for x
    x = 223,169,012,686.15/508,747.10
  6. Step 6: Final answer
    x = 438,663.95

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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.