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Finding the Fourth Proportional to 345.38, 516.82 and 253.85

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Solution

The fourth proportional to 345.38, 516.82 and 253.85 is: 379.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.38 : 516.82 = 253.85 : x
  2. Step 2: Convert to fraction form
    345.38/516.82 = 253.85/x
  3. Step 3: Cross multiply
    345.38x = 516.82 × 253.85
  4. Step 4: Simplify right side
    345.38x = 131,192.17
  5. Step 5: Solve for x
    x = 131,192.17/345.38
  6. Step 6: Final answer
    x = 379.85

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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.