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Finding the Fourth Proportional to 562.71, 843.39 and 318.90

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Solution

The fourth proportional to 562.71, 843.39 and 318.90 is: 477.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.71 : 843.39 = 318.90 : x
  2. Step 2: Convert to fraction form
    562.71/843.39 = 318.90/x
  3. Step 3: Cross multiply
    562.71x = 843.39 × 318.90
  4. Step 4: Simplify right side
    562.71x = 268,957.07
  5. Step 5: Solve for x
    x = 268,957.07/562.71
  6. Step 6: Final answer
    x = 477.97

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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.