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Finding the Third Proportional to 1,439.75 and 2,159.13

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Solution

The third proportional to 1,439.75 and 2,159.13 is: 3,237.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.75 : 2,159.13 = 2,159.13 : x
  2. Step 2: Convert to fraction form
    1,439.75/2,159.13 = 2,159.13/x
  3. Step 3: Cross multiply
    1,439.75x = 2,159.13 × 2,159.13
  4. Step 4: Simplify right side
    1,439.75x = 4,661,820.77
  5. Step 5: Solve for x
    x = 4,661,820.77/1,439.75
  6. Step 6: Final answer
    x = 3,237.94

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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.