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Finding the Fourth Proportional to 757.29, 1,135.69 and 708.10

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Solution

The fourth proportional to 757.29, 1,135.69 and 708.10 is: 1,061.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.29 : 1,135.69 = 708.10 : x
  2. Step 2: Convert to fraction form
    757.29/1,135.69 = 708.10/x
  3. Step 3: Cross multiply
    757.29x = 1,135.69 × 708.10
  4. Step 4: Simplify right side
    757.29x = 804,177.48
  5. Step 5: Solve for x
    x = 804,177.48/757.29
  6. Step 6: Final answer
    x = 1,061.91

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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.