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Finding the Third Proportional to 129,811.50 and 280,359

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Solution

The third proportional to 129,811.50 and 280,359 is: 605,502.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,811.50 : 280,359 = 280,359 : x
  2. Step 2: Convert to fraction form
    129,811.50/280,359 = 280,359/x
  3. Step 3: Cross multiply
    129,811.50x = 280,359 × 280,359
  4. Step 4: Simplify right side
    129,811.50x = 78,601,168,881
  5. Step 5: Solve for x
    x = 78,601,168,881/129,811.50
  6. Step 6: Final answer
    x = 605,502.35

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.