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Finding the Fourth Proportional to 517.38, 713.98 and 342.72

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Solution

The fourth proportional to 517.38, 713.98 and 342.72 is: 472.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.38 : 713.98 = 342.72 : x
  2. Step 2: Convert to fraction form
    517.38/713.98 = 342.72/x
  3. Step 3: Cross multiply
    517.38x = 713.98 × 342.72
  4. Step 4: Simplify right side
    517.38x = 244,694.37
  5. Step 5: Solve for x
    x = 244,694.37/517.38
  6. Step 6: Final answer
    x = 472.95

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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.