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Finding the Fourth Proportional to 265,940.40, 398,947.05 and 88,428.90

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Solution

The fourth proportional to 265,940.40, 398,947.05 and 88,428.90 is: 132,655.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,940.40 : 398,947.05 = 88,428.90 : x
  2. Step 2: Convert to fraction form
    265,940.40/398,947.05 = 88,428.90/x
  3. Step 3: Cross multiply
    265,940.40x = 398,947.05 × 88,428.90
  4. Step 4: Simplify right side
    265,940.40x = 35,278,448,789.75
  5. Step 5: Solve for x
    x = 35,278,448,789.75/265,940.40
  6. Step 6: Final answer
    x = 132,655.47

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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.