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Finding the Third Proportional to 856.31 and 1,279.13

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Solution

The third proportional to 856.31 and 1,279.13 is: 1,910.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.31 : 1,279.13 = 1,279.13 : x
  2. Step 2: Convert to fraction form
    856.31/1,279.13 = 1,279.13/x
  3. Step 3: Cross multiply
    856.31x = 1,279.13 × 1,279.13
  4. Step 4: Simplify right side
    856.31x = 1,636,160.77
  5. Step 5: Solve for x
    x = 1,636,160.77/856.31
  6. Step 6: Final answer
    x = 1,910.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.