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Finding the Fourth Proportional to 221,490.80, 332,236.20 and 220,178.60

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Solution

The fourth proportional to 221,490.80, 332,236.20 and 220,178.60 is: 330,267.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,490.80 : 332,236.20 = 220,178.60 : x
  2. Step 2: Convert to fraction form
    221,490.80/332,236.20 = 220,178.60/x
  3. Step 3: Cross multiply
    221,490.80x = 332,236.20 × 220,178.60
  4. Step 4: Simplify right side
    221,490.80x = 73,151,301,385.32
  5. Step 5: Solve for x
    x = 73,151,301,385.32/221,490.80
  6. Step 6: Final answer
    x = 330,267.90

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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.