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Finding the Third Proportional to 159.50 and 248.50

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Solution

The third proportional to 159.50 and 248.50 is: 387.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.50 : 248.50 = 248.50 : x
  2. Step 2: Convert to fraction form
    159.50/248.50 = 248.50/x
  3. Step 3: Cross multiply
    159.50x = 248.50 × 248.50
  4. Step 4: Simplify right side
    159.50x = 61,752.25
  5. Step 5: Solve for x
    x = 61,752.25/159.50
  6. Step 6: Final answer
    x = 387.16

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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.