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Finding the Third Proportional to 874.13 and 1,386.19

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Solution

The third proportional to 874.13 and 1,386.19 is: 2,198.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.13 : 1,386.19 = 1,386.19 : x
  2. Step 2: Convert to fraction form
    874.13/1,386.19 = 1,386.19/x
  3. Step 3: Cross multiply
    874.13x = 1,386.19 × 1,386.19
  4. Step 4: Simplify right side
    874.13x = 1,921,515.79
  5. Step 5: Solve for x
    x = 1,921,515.79/874.13
  6. Step 6: Final answer
    x = 2,198.22

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.