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Finding the Fourth Proportional to 316.73, 475.15 and 280.52

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Solution

The fourth proportional to 316.73, 475.15 and 280.52 is: 420.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.73 : 475.15 = 280.52 : x
  2. Step 2: Convert to fraction form
    316.73/475.15 = 280.52/x
  3. Step 3: Cross multiply
    316.73x = 475.15 × 280.52
  4. Step 4: Simplify right side
    316.73x = 133,289.08
  5. Step 5: Solve for x
    x = 133,289.08/316.73
  6. Step 6: Final answer
    x = 420.83

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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.