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Finding the Fourth Proportional to 278.71, 417.97 and 116.31

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Solution

The fourth proportional to 278.71, 417.97 and 116.31 is: 174.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.71 : 417.97 = 116.31 : x
  2. Step 2: Convert to fraction form
    278.71/417.97 = 116.31/x
  3. Step 3: Cross multiply
    278.71x = 417.97 × 116.31
  4. Step 4: Simplify right side
    278.71x = 48,614.09
  5. Step 5: Solve for x
    x = 48,614.09/278.71
  6. Step 6: Final answer
    x = 174.43

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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.