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Finding the Third Proportional to 401,760 and 865,020

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Solution

The third proportional to 401,760 and 865,020 is: 1,862,454.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,760 : 865,020 = 865,020 : x
  2. Step 2: Convert to fraction form
    401,760/865,020 = 865,020/x
  3. Step 3: Cross multiply
    401,760x = 865,020 × 865,020
  4. Step 4: Simplify right side
    401,760x = 748,259,600,400
  5. Step 5: Solve for x
    x = 748,259,600,400/401,760
  6. Step 6: Final answer
    x = 1,862,454.20

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.