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Finding the Fourth Proportional to 417.28, 575.91 and 240.23

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Solution

The fourth proportional to 417.28, 575.91 and 240.23 is: 331.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.28 : 575.91 = 240.23 : x
  2. Step 2: Convert to fraction form
    417.28/575.91 = 240.23/x
  3. Step 3: Cross multiply
    417.28x = 575.91 × 240.23
  4. Step 4: Simplify right side
    417.28x = 138,349.87
  5. Step 5: Solve for x
    x = 138,349.87/417.28
  6. Step 6: Final answer
    x = 331.55

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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.