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Finding the Fourth Proportional to 389,791.20, 584,686.78 and 146,677.96

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Solution

The fourth proportional to 389,791.20, 584,686.78 and 146,677.96 is: 220,016.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,791.20 : 584,686.78 = 146,677.96 : x
  2. Step 2: Convert to fraction form
    389,791.20/584,686.78 = 146,677.96/x
  3. Step 3: Cross multiply
    389,791.20x = 584,686.78 × 146,677.96
  4. Step 4: Simplify right side
    389,791.20x = 85,760,664,129.37
  5. Step 5: Solve for x
    x = 85,760,664,129.37/389,791.20
  6. Step 6: Final answer
    x = 220,016.93

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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.