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Finding the Third Proportional to 128,476 and 282,581

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Solution

The third proportional to 128,476 and 282,581 is: 621,532.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,476 : 282,581 = 282,581 : x
  2. Step 2: Convert to fraction form
    128,476/282,581 = 282,581/x
  3. Step 3: Cross multiply
    128,476x = 282,581 × 282,581
  4. Step 4: Simplify right side
    128,476x = 79,852,021,561
  5. Step 5: Solve for x
    x = 79,852,021,561/128,476
  6. Step 6: Final answer
    x = 621,532.59

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.