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Finding the Fourth Proportional to 766.23, 1,057.38 and 517.17

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Solution

The fourth proportional to 766.23, 1,057.38 and 517.17 is: 713.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.23 : 1,057.38 = 517.17 : x
  2. Step 2: Convert to fraction form
    766.23/1,057.38 = 517.17/x
  3. Step 3: Cross multiply
    766.23x = 1,057.38 × 517.17
  4. Step 4: Simplify right side
    766.23x = 546,845.21
  5. Step 5: Solve for x
    x = 546,845.21/766.23
  6. Step 6: Final answer
    x = 713.68

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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.