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Finding the Fourth Proportional to 576,187.20, 862,207.20 and 389,563.20

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Solution

The fourth proportional to 576,187.20, 862,207.20 and 389,563.20 is: 582,942.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,187.20 : 862,207.20 = 389,563.20 : x
  2. Step 2: Convert to fraction form
    576,187.20/862,207.20 = 389,563.20/x
  3. Step 3: Cross multiply
    576,187.20x = 862,207.20 × 389,563.20
  4. Step 4: Simplify right side
    576,187.20x = 335,884,195,895.04
  5. Step 5: Solve for x
    x = 335,884,195,895.04/576,187.20
  6. Step 6: Final answer
    x = 582,942.83

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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.