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Finding the Fourth Proportional to 502.13, 692.94 and 281.09

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Solution

The fourth proportional to 502.13, 692.94 and 281.09 is: 387.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.13 : 692.94 = 281.09 : x
  2. Step 2: Convert to fraction form
    502.13/692.94 = 281.09/x
  3. Step 3: Cross multiply
    502.13x = 692.94 × 281.09
  4. Step 4: Simplify right side
    502.13x = 194,778.50
  5. Step 5: Solve for x
    x = 194,778.50/502.13
  6. Step 6: Final answer
    x = 387.90

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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.