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Finding the Fourth Proportional to 389,627.20, 584,440.80 and 275,465.80

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Solution

The fourth proportional to 389,627.20, 584,440.80 and 275,465.80 is: 413,198.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,627.20 : 584,440.80 = 275,465.80 : x
  2. Step 2: Convert to fraction form
    389,627.20/584,440.80 = 275,465.80/x
  3. Step 3: Cross multiply
    389,627.20x = 584,440.80 × 275,465.80
  4. Step 4: Simplify right side
    389,627.20x = 160,993,452,524.64
  5. Step 5: Solve for x
    x = 160,993,452,524.64/389,627.20
  6. Step 6: Final answer
    x = 413,198.70

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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.