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Finding the Fourth Proportional to 862,807.30, 1,294,198.80 and 389,491.90

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Solution

The fourth proportional to 862,807.30, 1,294,198.80 and 389,491.90 is: 584,232.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,807.30 : 1,294,198.80 = 389,491.90 : x
  2. Step 2: Convert to fraction form
    862,807.30/1,294,198.80 = 389,491.90/x
  3. Step 3: Cross multiply
    862,807.30x = 1,294,198.80 × 389,491.90
  4. Step 4: Simplify right side
    862,807.30x = 504,079,949,589.72
  5. Step 5: Solve for x
    x = 504,079,949,589.72/862,807.30
  6. Step 6: Final answer
    x = 584,232.37

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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.