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Finding the Fourth Proportional to 567.49, 781.49 and 520.71

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Solution

The fourth proportional to 567.49, 781.49 and 520.71 is: 717.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.49 : 781.49 = 520.71 : x
  2. Step 2: Convert to fraction form
    567.49/781.49 = 520.71/x
  3. Step 3: Cross multiply
    567.49x = 781.49 × 520.71
  4. Step 4: Simplify right side
    567.49x = 406,930.96
  5. Step 5: Solve for x
    x = 406,930.96/567.49
  6. Step 6: Final answer
    x = 717.07

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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.