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Finding the Fourth Proportional to 258.17, 385.34 and 240.11

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Solution

The fourth proportional to 258.17, 385.34 and 240.11 is: 358.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.17 : 385.34 = 240.11 : x
  2. Step 2: Convert to fraction form
    258.17/385.34 = 240.11/x
  3. Step 3: Cross multiply
    258.17x = 385.34 × 240.11
  4. Step 4: Simplify right side
    258.17x = 92,520.86
  5. Step 5: Solve for x
    x = 92,520.86/258.17
  6. Step 6: Final answer
    x = 358.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.