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Finding the Fourth Proportional to 220,645.20, 330,967.80 and 80,385.60

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Solution

The fourth proportional to 220,645.20, 330,967.80 and 80,385.60 is: 120,578.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,645.20 : 330,967.80 = 80,385.60 : x
  2. Step 2: Convert to fraction form
    220,645.20/330,967.80 = 80,385.60/x
  3. Step 3: Cross multiply
    220,645.20x = 330,967.80 × 80,385.60
  4. Step 4: Simplify right side
    220,645.20x = 26,605,045,183.68
  5. Step 5: Solve for x
    x = 26,605,045,183.68/220,645.20
  6. Step 6: Final answer
    x = 120,578.40

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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.