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Finding the Fourth Proportional to 251.28, 375.11 and 240.05

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Solution

The fourth proportional to 251.28, 375.11 and 240.05 is: 358.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.28 : 375.11 = 240.05 : x
  2. Step 2: Convert to fraction form
    251.28/375.11 = 240.05/x
  3. Step 3: Cross multiply
    251.28x = 375.11 × 240.05
  4. Step 4: Simplify right side
    251.28x = 90,044.89
  5. Step 5: Solve for x
    x = 90,044.89/251.28
  6. Step 6: Final answer
    x = 358.34

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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.