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Finding the Fourth Proportional to 389,859.39, 584,810.35 and 123,600.65

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Solution

The fourth proportional to 389,859.39, 584,810.35 and 123,600.65 is: 185,407.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,859.39 : 584,810.35 = 123,600.65 : x
  2. Step 2: Convert to fraction form
    389,859.39/584,810.35 = 123,600.65/x
  3. Step 3: Cross multiply
    389,859.39x = 584,810.35 × 123,600.65
  4. Step 4: Simplify right side
    389,859.39x = 72,282,938,233.70
  5. Step 5: Solve for x
    x = 72,282,938,233.70/389,859.39
  6. Step 6: Final answer
    x = 185,407.71

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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.