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Finding the Fourth Proportional to 220,380.80, 330,878.40 and 137,436.80

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Solution

The fourth proportional to 220,380.80, 330,878.40 and 137,436.80 is: 206,346.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,380.80 : 330,878.40 = 137,436.80 : x
  2. Step 2: Convert to fraction form
    220,380.80/330,878.40 = 137,436.80/x
  3. Step 3: Cross multiply
    220,380.80x = 330,878.40 × 137,436.80
  4. Step 4: Simplify right side
    220,380.80x = 45,474,868,485.12
  5. Step 5: Solve for x
    x = 45,474,868,485.12/220,380.80
  6. Step 6: Final answer
    x = 206,346.78

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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.