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Finding the Fourth Proportional to 406.54, 560.89 and 240.78

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Solution

The fourth proportional to 406.54, 560.89 and 240.78 is: 332.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.54 : 560.89 = 240.78 : x
  2. Step 2: Convert to fraction form
    406.54/560.89 = 240.78/x
  3. Step 3: Cross multiply
    406.54x = 560.89 × 240.78
  4. Step 4: Simplify right side
    406.54x = 135,051.09
  5. Step 5: Solve for x
    x = 135,051.09/406.54
  6. Step 6: Final answer
    x = 332.20

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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.