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Finding the Fourth Proportional to 265,943.88, 398,990.88 and 108,285.48

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Solution

The fourth proportional to 265,943.88, 398,990.88 and 108,285.48 is: 162,458.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,943.88 : 398,990.88 = 108,285.48 : x
  2. Step 2: Convert to fraction form
    265,943.88/398,990.88 = 108,285.48/x
  3. Step 3: Cross multiply
    265,943.88x = 398,990.88 × 108,285.48
  4. Step 4: Simplify right side
    265,943.88x = 43,204,918,956.42
  5. Step 5: Solve for x
    x = 43,204,918,956.42/265,943.88
  6. Step 6: Final answer
    x = 162,458.78

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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.