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Finding the Third Proportional to 154.69 and 239.91

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Solution

The third proportional to 154.69 and 239.91 is: 372.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.69 : 239.91 = 239.91 : x
  2. Step 2: Convert to fraction form
    154.69/239.91 = 239.91/x
  3. Step 3: Cross multiply
    154.69x = 239.91 × 239.91
  4. Step 4: Simplify right side
    154.69x = 57,555.01
  5. Step 5: Solve for x
    x = 57,555.01/154.69
  6. Step 6: Final answer
    x = 372.07

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.