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Finding the Third Proportional to 489,234 and 748,440

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Solution

The third proportional to 489,234 and 748,440 is: 1,144,978.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,234 : 748,440 = 748,440 : x
  2. Step 2: Convert to fraction form
    489,234/748,440 = 748,440/x
  3. Step 3: Cross multiply
    489,234x = 748,440 × 748,440
  4. Step 4: Simplify right side
    489,234x = 560,162,433,600
  5. Step 5: Solve for x
    x = 560,162,433,600/489,234
  6. Step 6: Final answer
    x = 1,144,978.55

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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.