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Finding the Third Proportional to 421,103.25 and 913,143.38

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Solution

The third proportional to 421,103.25 and 913,143.38 is: 1,980,110.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,103.25 : 913,143.38 = 913,143.38 : x
  2. Step 2: Convert to fraction form
    421,103.25/913,143.38 = 913,143.38/x
  3. Step 3: Cross multiply
    421,103.25x = 913,143.38 × 913,143.38
  4. Step 4: Simplify right side
    421,103.25x = 833,830,823,306.39
  5. Step 5: Solve for x
    x = 833,830,823,306.39/421,103.25
  6. Step 6: Final answer
    x = 1,980,110.16

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.