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Finding the Third Proportional to 159.47 and 248.70

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Solution

The third proportional to 159.47 and 248.70 is: 387.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.47 : 248.70 = 248.70 : x
  2. Step 2: Convert to fraction form
    159.47/248.70 = 248.70/x
  3. Step 3: Cross multiply
    159.47x = 248.70 × 248.70
  4. Step 4: Simplify right side
    159.47x = 61,849.36
  5. Step 5: Solve for x
    x = 61,849.36/159.47
  6. Step 6: Final answer
    x = 387.85

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.