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Finding the Fourth Proportional to 502.07, 692.79 and 280.99

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Solution

The fourth proportional to 502.07, 692.79 and 280.99 is: 387.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.07 : 692.79 = 280.99 : x
  2. Step 2: Convert to fraction form
    502.07/692.79 = 280.99/x
  3. Step 3: Cross multiply
    502.07x = 692.79 × 280.99
  4. Step 4: Simplify right side
    502.07x = 194,663.60
  5. Step 5: Solve for x
    x = 194,663.60/502.07
  6. Step 6: Final answer
    x = 387.72

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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.