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Finding the Third Proportional to 1,279.13 and 1,977.19

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Solution

The third proportional to 1,279.13 and 1,977.19 is: 3,056.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.13 : 1,977.19 = 1,977.19 : x
  2. Step 2: Convert to fraction form
    1,279.13/1,977.19 = 1,977.19/x
  3. Step 3: Cross multiply
    1,279.13x = 1,977.19 × 1,977.19
  4. Step 4: Simplify right side
    1,279.13x = 3,909,270.41
  5. Step 5: Solve for x
    x = 3,909,270.41/1,279.13
  6. Step 6: Final answer
    x = 3,056.21

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.