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Finding the Fourth Proportional to 657.08, 907.13 and 517.66

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Solution

The fourth proportional to 657.08, 907.13 and 517.66 is: 714.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.08 : 907.13 = 517.66 : x
  2. Step 2: Convert to fraction form
    657.08/907.13 = 517.66/x
  3. Step 3: Cross multiply
    657.08x = 907.13 × 517.66
  4. Step 4: Simplify right side
    657.08x = 469,583.94
  5. Step 5: Solve for x
    x = 469,583.94/657.08
  6. Step 6: Final answer
    x = 714.65

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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.