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Finding the Third Proportional to 139.88 and 291.13

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Solution

The third proportional to 139.88 and 291.13 is: 605.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.88 : 291.13 = 291.13 : x
  2. Step 2: Convert to fraction form
    139.88/291.13 = 291.13/x
  3. Step 3: Cross multiply
    139.88x = 291.13 × 291.13
  4. Step 4: Simplify right side
    139.88x = 84,753.77
  5. Step 5: Solve for x
    x = 84,753.77/139.88
  6. Step 6: Final answer
    x = 605.93

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.