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Finding the Third Proportional to 485,698.78 and 728,605.13

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Solution

The third proportional to 485,698.78 and 728,605.13 is: 1,092,993.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,698.78 : 728,605.13 = 728,605.13 : x
  2. Step 2: Convert to fraction form
    485,698.78/728,605.13 = 728,605.13/x
  3. Step 3: Cross multiply
    485,698.78x = 728,605.13 × 728,605.13
  4. Step 4: Simplify right side
    485,698.78x = 530,865,428,176.27
  5. Step 5: Solve for x
    x = 530,865,428,176.27/485,698.78
  6. Step 6: Final answer
    x = 1,092,993.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.