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Finding the Fourth Proportional to 406.31, 560.78 and 240.66

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Solution

The fourth proportional to 406.31, 560.78 and 240.66 is: 332.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.31 : 560.78 = 240.66 : x
  2. Step 2: Convert to fraction form
    406.31/560.78 = 240.66/x
  3. Step 3: Cross multiply
    406.31x = 560.78 × 240.66
  4. Step 4: Simplify right side
    406.31x = 134,956.11
  5. Step 5: Solve for x
    x = 134,956.11/406.31
  6. Step 6: Final answer
    x = 332.15

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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.