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Finding the Third Proportional to 129,400.50 and 282,790.50

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Solution

The third proportional to 129,400.50 and 282,790.50 is: 618,007.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,400.50 : 282,790.50 = 282,790.50 : x
  2. Step 2: Convert to fraction form
    129,400.50/282,790.50 = 282,790.50/x
  3. Step 3: Cross multiply
    129,400.50x = 282,790.50 × 282,790.50
  4. Step 4: Simplify right side
    129,400.50x = 79,970,466,890.25
  5. Step 5: Solve for x
    x = 79,970,466,890.25/129,400.50
  6. Step 6: Final answer
    x = 618,007.40

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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.