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Finding the Fourth Proportional to 389,807.88, 584,732.61 and 123,589.23

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Solution

The fourth proportional to 389,807.88, 584,732.61 and 123,589.23 is: 185,390.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,807.88 : 584,732.61 = 123,589.23 : x
  2. Step 2: Convert to fraction form
    389,807.88/584,732.61 = 123,589.23/x
  3. Step 3: Cross multiply
    389,807.88x = 584,732.61 × 123,589.23
  4. Step 4: Simplify right side
    389,807.88x = 72,266,653,025.79
  5. Step 5: Solve for x
    x = 72,266,653,025.79/389,807.88
  6. Step 6: Final answer
    x = 185,390.44

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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.