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Finding the Third Proportional to 129,369 and 282,786

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Solution

The third proportional to 129,369 and 282,786 is: 618,138.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,369 : 282,786 = 282,786 : x
  2. Step 2: Convert to fraction form
    129,369/282,786 = 282,786/x
  3. Step 3: Cross multiply
    129,369x = 282,786 × 282,786
  4. Step 4: Simplify right side
    129,369x = 79,967,921,796
  5. Step 5: Solve for x
    x = 79,967,921,796/129,369
  6. Step 6: Final answer
    x = 618,138.21

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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.