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Finding the Third Proportional to 489,218 and 748,418

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Solution

The third proportional to 489,218 and 748,418 is: 1,144,948.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,218 : 748,418 = 748,418 : x
  2. Step 2: Convert to fraction form
    489,218/748,418 = 748,418/x
  3. Step 3: Cross multiply
    489,218x = 748,418 × 748,418
  4. Step 4: Simplify right side
    489,218x = 560,129,502,724
  5. Step 5: Solve for x
    x = 560,129,502,724/489,218
  6. Step 6: Final answer
    x = 1,144,948.68

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.