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Finding the Fourth Proportional to 378,198.60, 566,520.30 and 260,003.40

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Solution

The fourth proportional to 378,198.60, 566,520.30 and 260,003.40 is: 389,470.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,198.60 : 566,520.30 = 260,003.40 : x
  2. Step 2: Convert to fraction form
    378,198.60/566,520.30 = 260,003.40/x
  3. Step 3: Cross multiply
    378,198.60x = 566,520.30 × 260,003.40
  4. Step 4: Simplify right side
    378,198.60x = 147,297,204,169.02
  5. Step 5: Solve for x
    x = 147,297,204,169.02/378,198.60
  6. Step 6: Final answer
    x = 389,470.52

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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.