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Finding the Fourth Proportional to 562.76, 843.58 and 318.78

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Solution

The fourth proportional to 562.76, 843.58 and 318.78 is: 477.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.76 : 843.58 = 318.78 : x
  2. Step 2: Convert to fraction form
    562.76/843.58 = 318.78/x
  3. Step 3: Cross multiply
    562.76x = 843.58 × 318.78
  4. Step 4: Simplify right side
    562.76x = 268,915.64
  5. Step 5: Solve for x
    x = 268,915.64/562.76
  6. Step 6: Final answer
    x = 477.85

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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.