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Finding the Third Proportional to 177,715.13 and 391,455

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Solution

The third proportional to 177,715.13 and 391,455 is: 862,262.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    177,715.13 : 391,455 = 391,455 : x
  2. Step 2: Convert to fraction form
    177,715.13/391,455 = 391,455/x
  3. Step 3: Cross multiply
    177,715.13x = 391,455 × 391,455
  4. Step 4: Simplify right side
    177,715.13x = 153,237,017,025
  5. Step 5: Solve for x
    x = 153,237,017,025/177,715.13
  6. Step 6: Final answer
    x = 862,262.10

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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.