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Finding the Fourth Proportional to 3,976,728.66, 5,486,139.45 and 2,687,098.50

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Solution

The fourth proportional to 3,976,728.66, 5,486,139.45 and 2,687,098.50 is: 3,707,016.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,976,728.66 : 5,486,139.45 = 2,687,098.50 : x
  2. Step 2: Convert to fraction form
    3,976,728.66/5,486,139.45 = 2,687,098.50/x
  3. Step 3: Cross multiply
    3,976,728.66x = 5,486,139.45 × 2,687,098.50
  4. Step 4: Simplify right side
    3,976,728.66x = 14,741,797,086,885.83
  5. Step 5: Solve for x
    x = 14,741,797,086,885.83/3,976,728.66
  6. Step 6: Final answer
    x = 3,707,016.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.