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Finding the Third Proportional to 489,534 and 748,789

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Solution

The third proportional to 489,534 and 748,789 is: 1,145,344.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,534 : 748,789 = 748,789 : x
  2. Step 2: Convert to fraction form
    489,534/748,789 = 748,789/x
  3. Step 3: Cross multiply
    489,534x = 748,789 × 748,789
  4. Step 4: Simplify right side
    489,534x = 560,684,966,521
  5. Step 5: Solve for x
    x = 560,684,966,521/489,534
  6. Step 6: Final answer
    x = 1,145,344.28

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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.