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Finding the Fourth Proportional to 220,439.40, 330,659.10 and 131,965.80

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Solution

The fourth proportional to 220,439.40, 330,659.10 and 131,965.80 is: 197,948.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,439.40 : 330,659.10 = 131,965.80 : x
  2. Step 2: Convert to fraction form
    220,439.40/330,659.10 = 131,965.80/x
  3. Step 3: Cross multiply
    220,439.40x = 330,659.10 × 131,965.80
  4. Step 4: Simplify right side
    220,439.40x = 43,635,692,658.78
  5. Step 5: Solve for x
    x = 43,635,692,658.78/220,439.40
  6. Step 6: Final answer
    x = 197,948.70

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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.