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Finding the Third Proportional to 406,105 and 631,306

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Solution

The third proportional to 406,105 and 631,306 is: 981,389.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,105 : 631,306 = 631,306 : x
  2. Step 2: Convert to fraction form
    406,105/631,306 = 631,306/x
  3. Step 3: Cross multiply
    406,105x = 631,306 × 631,306
  4. Step 4: Simplify right side
    406,105x = 398,547,265,636
  5. Step 5: Solve for x
    x = 398,547,265,636/406,105
  6. Step 6: Final answer
    x = 981,389.70

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.