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Finding the Third Proportional to 139.88 and 237.19

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Solution

The third proportional to 139.88 and 237.19 is: 402.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.88 : 237.19 = 237.19 : x
  2. Step 2: Convert to fraction form
    139.88/237.19 = 237.19/x
  3. Step 3: Cross multiply
    139.88x = 237.19 × 237.19
  4. Step 4: Simplify right side
    139.88x = 56,257.91
  5. Step 5: Solve for x
    x = 56,257.91/139.88
  6. Step 6: Final answer
    x = 402.20

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Why These Related Problems?

These problems maintain the same ratio (1.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.