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Finding the Third Proportional to 129,454.50 and 282,939

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Solution

The third proportional to 129,454.50 and 282,939 is: 618,398.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,454.50 : 282,939 = 282,939 : x
  2. Step 2: Convert to fraction form
    129,454.50/282,939 = 282,939/x
  3. Step 3: Cross multiply
    129,454.50x = 282,939 × 282,939
  4. Step 4: Simplify right side
    129,454.50x = 80,054,477,721
  5. Step 5: Solve for x
    x = 80,054,477,721/129,454.50
  6. Step 6: Final answer
    x = 618,398.57

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.