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Finding the Third Proportional to 129,828 and 283,688

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Solution

The third proportional to 129,828 and 283,688 is: 619,888.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,828 : 283,688 = 283,688 : x
  2. Step 2: Convert to fraction form
    129,828/283,688 = 283,688/x
  3. Step 3: Cross multiply
    129,828x = 283,688 × 283,688
  4. Step 4: Simplify right side
    129,828x = 80,478,881,344
  5. Step 5: Solve for x
    x = 80,478,881,344/129,828
  6. Step 6: Final answer
    x = 619,888.48

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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.