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Finding the Fourth Proportional to 517.56, 714.16 and 284.70

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Solution

The fourth proportional to 517.56, 714.16 and 284.70 is: 392.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.56 : 714.16 = 284.70 : x
  2. Step 2: Convert to fraction form
    517.56/714.16 = 284.70/x
  3. Step 3: Cross multiply
    517.56x = 714.16 × 284.70
  4. Step 4: Simplify right side
    517.56x = 203,321.35
  5. Step 5: Solve for x
    x = 203,321.35/517.56
  6. Step 6: Final answer
    x = 392.85

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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.