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Finding the Third Proportional to 139.13 and 292.88

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Solution

The third proportional to 139.13 and 292.88 is: 616.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.13 : 292.88 = 292.88 : x
  2. Step 2: Convert to fraction form
    139.13/292.88 = 292.88/x
  3. Step 3: Cross multiply
    139.13x = 292.88 × 292.88
  4. Step 4: Simplify right side
    139.13x = 85,775.77
  5. Step 5: Solve for x
    x = 85,775.77/139.13
  6. Step 6: Final answer
    x = 616.54

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.