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Finding the Fourth Proportional to 438.62, 657.86 and 113.97

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Solution

The fourth proportional to 438.62, 657.86 and 113.97 is: 170.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.62 : 657.86 = 113.97 : x
  2. Step 2: Convert to fraction form
    438.62/657.86 = 113.97/x
  3. Step 3: Cross multiply
    438.62x = 657.86 × 113.97
  4. Step 4: Simplify right side
    438.62x = 74,975.73
  5. Step 5: Solve for x
    x = 74,975.73/438.62
  6. Step 6: Final answer
    x = 170.94

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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.