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Finding the Fourth Proportional to 406.14, 560.61 and 280.17

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Solution

The fourth proportional to 406.14, 560.61 and 280.17 is: 386.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.14 : 560.61 = 280.17 : x
  2. Step 2: Convert to fraction form
    406.14/560.61 = 280.17/x
  3. Step 3: Cross multiply
    406.14x = 560.61 × 280.17
  4. Step 4: Simplify right side
    406.14x = 157,064.70
  5. Step 5: Solve for x
    x = 157,064.70/406.14
  6. Step 6: Final answer
    x = 386.73

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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.