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Finding the Fourth Proportional to 220,431.44, 330,740.78 and 120,474.86

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Solution

The fourth proportional to 220,431.44, 330,740.78 and 120,474.86 is: 180,763.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,431.44 : 330,740.78 = 120,474.86 : x
  2. Step 2: Convert to fraction form
    220,431.44/330,740.78 = 120,474.86/x
  3. Step 3: Cross multiply
    220,431.44x = 330,740.78 × 120,474.86
  4. Step 4: Simplify right side
    220,431.44x = 39,845,946,910.71
  5. Step 5: Solve for x
    x = 39,845,946,910.71/220,431.44
  6. Step 6: Final answer
    x = 180,763.44

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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.