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Finding the Fourth Proportional to 389,608.88, 584,471.75 and 136,844.82

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Solution

The fourth proportional to 389,608.88, 584,471.75 and 136,844.82 is: 205,287.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,608.88 : 584,471.75 = 136,844.82 : x
  2. Step 2: Convert to fraction form
    389,608.88/584,471.75 = 136,844.82/x
  3. Step 3: Cross multiply
    389,608.88x = 584,471.75 × 136,844.82
  4. Step 4: Simplify right side
    389,608.88x = 79,981,930,739.61
  5. Step 5: Solve for x
    x = 79,981,930,739.61/389,608.88
  6. Step 6: Final answer
    x = 205,287.75

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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.