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Finding the Fourth Proportional to 861,578.94, 1,189,346.49 and 613,380.90

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Solution

The fourth proportional to 861,578.94, 1,189,346.49 and 613,380.90 is: 846,727.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,578.94 : 1,189,346.49 = 613,380.90 : x
  2. Step 2: Convert to fraction form
    861,578.94/1,189,346.49 = 613,380.90/x
  3. Step 3: Cross multiply
    861,578.94x = 1,189,346.49 × 613,380.90
  4. Step 4: Simplify right side
    861,578.94x = 729,522,420,448.04
  5. Step 5: Solve for x
    x = 729,522,420,448.04/861,578.94
  6. Step 6: Final answer
    x = 846,727.31

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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.