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Finding the Fourth Proportional to 265,198.80, 398,015.80 and 263,125.20

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Solution

The fourth proportional to 265,198.80, 398,015.80 and 263,125.20 is: 394,903.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,198.80 : 398,015.80 = 263,125.20 : x
  2. Step 2: Convert to fraction form
    265,198.80/398,015.80 = 263,125.20/x
  3. Step 3: Cross multiply
    265,198.80x = 398,015.80 × 263,125.20
  4. Step 4: Simplify right side
    265,198.80x = 104,727,986,978.16
  5. Step 5: Solve for x
    x = 104,727,986,978.16/265,198.80
  6. Step 6: Final answer
    x = 394,903.70

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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.