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Finding the Fourth Proportional to 2,489,631.80, 3,734,447.70 and 806,905.40

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Solution

The fourth proportional to 2,489,631.80, 3,734,447.70 and 806,905.40 is: 1,210,358.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489,631.80 : 3,734,447.70 = 806,905.40 : x
  2. Step 2: Convert to fraction form
    2,489,631.80/3,734,447.70 = 806,905.40/x
  3. Step 3: Cross multiply
    2,489,631.80x = 3,734,447.70 × 806,905.40
  4. Step 4: Simplify right side
    2,489,631.80x = 3,013,346,015,147.58
  5. Step 5: Solve for x
    x = 3,013,346,015,147.58/2,489,631.80
  6. Step 6: Final answer
    x = 1,210,358.10

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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.