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Finding the Fourth Proportional to 389,872.38, 584,881.48 and 123,561.38

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Solution

The fourth proportional to 389,872.38, 584,881.48 and 123,561.38 is: 185,365.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,872.38 : 584,881.48 = 123,561.38 : x
  2. Step 2: Convert to fraction form
    389,872.38/584,881.48 = 123,561.38/x
  3. Step 3: Cross multiply
    389,872.38x = 584,881.48 × 123,561.38
  4. Step 4: Simplify right side
    389,872.38x = 72,268,762,805.24
  5. Step 5: Solve for x
    x = 72,268,762,805.24/389,872.38
  6. Step 6: Final answer
    x = 185,365.18

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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.