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Finding the Fourth Proportional to 220,345.20, 330,517.80 and 209,458.80

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Solution

The fourth proportional to 220,345.20, 330,517.80 and 209,458.80 is: 314,188.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,345.20 : 330,517.80 = 209,458.80 : x
  2. Step 2: Convert to fraction form
    220,345.20/330,517.80 = 209,458.80/x
  3. Step 3: Cross multiply
    220,345.20x = 330,517.80 × 209,458.80
  4. Step 4: Simplify right side
    220,345.20x = 69,229,861,766.64
  5. Step 5: Solve for x
    x = 69,229,861,766.64/220,345.20
  6. Step 6: Final answer
    x = 314,188.20

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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.