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Finding the Fourth Proportional to 861,660, 1,189,118.16 and 539,267.04

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Solution

The fourth proportional to 861,660, 1,189,118.16 and 539,267.04 is: 744,205.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,660 : 1,189,118.16 = 539,267.04 : x
  2. Step 2: Convert to fraction form
    861,660/1,189,118.16 = 539,267.04/x
  3. Step 3: Cross multiply
    861,660x = 1,189,118.16 × 539,267.04
  4. Step 4: Simplify right side
    861,660x = 641,252,230,353.45
  5. Step 5: Solve for x
    x = 641,252,230,353.45/861,660
  6. Step 6: Final answer
    x = 744,205.64

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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.