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Finding the Fourth Proportional to 502.00, 692.75 and 280.95

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Solution

The fourth proportional to 502.00, 692.75 and 280.95 is: 387.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.00 : 692.75 = 280.95 : x
  2. Step 2: Convert to fraction form
    502.00/692.75 = 280.95/x
  3. Step 3: Cross multiply
    502.00x = 692.75 × 280.95
  4. Step 4: Simplify right side
    502.00x = 194,627.42
  5. Step 5: Solve for x
    x = 194,627.42/502.00
  6. Step 6: Final answer
    x = 387.70

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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.