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Finding the Third Proportional to 862.88 and 1,215.13

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Solution

The third proportional to 862.88 and 1,215.13 is: 1,711.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.88 : 1,215.13 = 1,215.13 : x
  2. Step 2: Convert to fraction form
    862.88/1,215.13 = 1,215.13/x
  3. Step 3: Cross multiply
    862.88x = 1,215.13 × 1,215.13
  4. Step 4: Simplify right side
    862.88x = 1,476,528.77
  5. Step 5: Solve for x
    x = 1,476,528.77/862.88
  6. Step 6: Final answer
    x = 1,711.17

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.