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Finding the Third Proportional to 413,175 and 638,448

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Solution

The third proportional to 413,175 and 638,448 is: 986,545.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,175 : 638,448 = 638,448 : x
  2. Step 2: Convert to fraction form
    413,175/638,448 = 638,448/x
  3. Step 3: Cross multiply
    413,175x = 638,448 × 638,448
  4. Step 4: Simplify right side
    413,175x = 407,615,848,704
  5. Step 5: Solve for x
    x = 407,615,848,704/413,175
  6. Step 6: Final answer
    x = 986,545.29

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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.