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Finding the Fourth Proportional to 502.14, 692.89 and 281.09

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Solution

The fourth proportional to 502.14, 692.89 and 281.09 is: 387.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.14 : 692.89 = 281.09 : x
  2. Step 2: Convert to fraction form
    502.14/692.89 = 281.09/x
  3. Step 3: Cross multiply
    502.14x = 692.89 × 281.09
  4. Step 4: Simplify right side
    502.14x = 194,764.45
  5. Step 5: Solve for x
    x = 194,764.45/502.14
  6. Step 6: Final answer
    x = 387.87

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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.