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Finding the Third Proportional to 129.19 and 282.56

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Solution

The third proportional to 129.19 and 282.56 is: 618.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.19 : 282.56 = 282.56 : x
  2. Step 2: Convert to fraction form
    129.19/282.56 = 282.56/x
  3. Step 3: Cross multiply
    129.19x = 282.56 × 282.56
  4. Step 4: Simplify right side
    129.19x = 79,841.57
  5. Step 5: Solve for x
    x = 79,841.57/129.19
  6. Step 6: Final answer
    x = 618.03

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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.