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Finding the Third Proportional to 870.13 and 1,306.88

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Solution

The third proportional to 870.13 and 1,306.88 is: 1,962.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    870.13 : 1,306.88 = 1,306.88 : x
  2. Step 2: Convert to fraction form
    870.13/1,306.88 = 1,306.88/x
  3. Step 3: Cross multiply
    870.13x = 1,306.88 × 1,306.88
  4. Step 4: Simplify right side
    870.13x = 1,707,922.27
  5. Step 5: Solve for x
    x = 1,707,922.27/870.13
  6. Step 6: Final answer
    x = 1,962.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.