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Finding the Third Proportional to 129.50 and 283

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Solution

The third proportional to 129.50 and 283 is: 618.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129.50 : 283 = 283 : x
  2. Step 2: Convert to fraction form
    129.50/283 = 283/x
  3. Step 3: Cross multiply
    129.50x = 283 × 283
  4. Step 4: Simplify right side
    129.50x = 80,089
  5. Step 5: Solve for x
    x = 80,089/129.50
  6. Step 6: Final answer
    x = 618.45

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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.