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Finding the Fourth Proportional to 718.38, 990.61 and 532.23

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Solution

The fourth proportional to 718.38, 990.61 and 532.23 is: 733.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.38 : 990.61 = 532.23 : x
  2. Step 2: Convert to fraction form
    718.38/990.61 = 532.23/x
  3. Step 3: Cross multiply
    718.38x = 990.61 × 532.23
  4. Step 4: Simplify right side
    718.38x = 527,232.36
  5. Step 5: Solve for x
    x = 527,232.36/718.38
  6. Step 6: Final answer
    x = 733.92

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Double scale
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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.