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Finding the Third Proportional to 74.39 and 158.41

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Solution

The third proportional to 74.39 and 158.41 is: 337.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.39 : 158.41 = 158.41 : x
  2. Step 2: Convert to fraction form
    74.39/158.41 = 158.41/x
  3. Step 3: Cross multiply
    74.39x = 158.41 × 158.41
  4. Step 4: Simplify right side
    74.39x = 25,095.02
  5. Step 5: Solve for x
    x = 25,095.02/74.39
  6. Step 6: Final answer
    x = 337.34

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.