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Finding the Third Proportional to 139.92 and 265.92

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Solution

The third proportional to 139.92 and 265.92 is: 505.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.92 : 265.92 = 265.92 : x
  2. Step 2: Convert to fraction form
    139.92/265.92 = 265.92/x
  3. Step 3: Cross multiply
    139.92x = 265.92 × 265.92
  4. Step 4: Simplify right side
    139.92x = 70,714.44
  5. Step 5: Solve for x
    x = 70,714.44/139.92
  6. Step 6: Final answer
    x = 505.39

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Why These Related Problems?

These problems maintain the same ratio (1.90) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.