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Finding the Fourth Proportional to 389,440.80, 584,161.20 and 239,193.90

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Solution

The fourth proportional to 389,440.80, 584,161.20 and 239,193.90 is: 358,790.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,440.80 : 584,161.20 = 239,193.90 : x
  2. Step 2: Convert to fraction form
    389,440.80/584,161.20 = 239,193.90/x
  3. Step 3: Cross multiply
    389,440.80x = 584,161.20 × 239,193.90
  4. Step 4: Simplify right side
    389,440.80x = 139,727,795,656.68
  5. Step 5: Solve for x
    x = 139,727,795,656.68/389,440.80
  6. Step 6: Final answer
    x = 358,790.85

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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.