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Finding the Fourth Proportional to 640.71, 883.17 and 523.17

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Solution

The fourth proportional to 640.71, 883.17 and 523.17 is: 721.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.71 : 883.17 = 523.17 : x
  2. Step 2: Convert to fraction form
    640.71/883.17 = 523.17/x
  3. Step 3: Cross multiply
    640.71x = 883.17 × 523.17
  4. Step 4: Simplify right side
    640.71x = 462,048.05
  5. Step 5: Solve for x
    x = 462,048.05/640.71
  6. Step 6: Final answer
    x = 721.15

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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.