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Finding the Third Proportional to 455,480 and 679,540

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Solution

The third proportional to 455,480 and 679,540 is: 1,013,819.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,480 : 679,540 = 679,540 : x
  2. Step 2: Convert to fraction form
    455,480/679,540 = 679,540/x
  3. Step 3: Cross multiply
    455,480x = 679,540 × 679,540
  4. Step 4: Simplify right side
    455,480x = 461,774,611,600
  5. Step 5: Solve for x
    x = 461,774,611,600/455,480
  6. Step 6: Final answer
    x = 1,013,819.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.