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Finding the Third Proportional to 129,368 and 282,780

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Solution

The third proportional to 129,368 and 282,780 is: 618,116.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,368 : 282,780 = 282,780 : x
  2. Step 2: Convert to fraction form
    129,368/282,780 = 282,780/x
  3. Step 3: Cross multiply
    129,368x = 282,780 × 282,780
  4. Step 4: Simplify right side
    129,368x = 79,964,528,400
  5. Step 5: Solve for x
    x = 79,964,528,400/129,368
  6. Step 6: Final answer
    x = 618,116.76

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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.