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Finding the Fourth Proportional to 414.79, 572.40 and 240.15

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Solution

The fourth proportional to 414.79, 572.40 and 240.15 is: 331.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.79 : 572.40 = 240.15 : x
  2. Step 2: Convert to fraction form
    414.79/572.40 = 240.15/x
  3. Step 3: Cross multiply
    414.79x = 572.40 × 240.15
  4. Step 4: Simplify right side
    414.79x = 137,461.86
  5. Step 5: Solve for x
    x = 137,461.86/414.79
  6. Step 6: Final answer
    x = 331.40

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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.