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Finding the Third Proportional to 154.38 and 242.88

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Solution

The third proportional to 154.38 and 242.88 is: 382.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.38 : 242.88 = 242.88 : x
  2. Step 2: Convert to fraction form
    154.38/242.88 = 242.88/x
  3. Step 3: Cross multiply
    154.38x = 242.88 × 242.88
  4. Step 4: Simplify right side
    154.38x = 58,988.27
  5. Step 5: Solve for x
    x = 58,988.27/154.38
  6. Step 6: Final answer
    x = 382.11

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.