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Finding the Fourth Proportional to 265,905.80, 398,858.70 and 225,816.20

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Solution

The fourth proportional to 265,905.80, 398,858.70 and 225,816.20 is: 338,724.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,905.80 : 398,858.70 = 225,816.20 : x
  2. Step 2: Convert to fraction form
    265,905.80/398,858.70 = 225,816.20/x
  3. Step 3: Cross multiply
    265,905.80x = 398,858.70 × 225,816.20
  4. Step 4: Simplify right side
    265,905.80x = 90,068,755,970.94
  5. Step 5: Solve for x
    x = 90,068,755,970.94/265,905.80
  6. Step 6: Final answer
    x = 338,724.30

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Similar ratio
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1.5x scale

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.