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Finding the Fourth Proportional to 278.27, 416.75 and 140.97

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Solution

The fourth proportional to 278.27, 416.75 and 140.97 is: 211.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.27 : 416.75 = 140.97 : x
  2. Step 2: Convert to fraction form
    278.27/416.75 = 140.97/x
  3. Step 3: Cross multiply
    278.27x = 416.75 × 140.97
  4. Step 4: Simplify right side
    278.27x = 58,750.11
  5. Step 5: Solve for x
    x = 58,750.11/278.27
  6. Step 6: Final answer
    x = 211.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.