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Finding the Fourth Proportional to 720,512.80, 1,080,769.20 and 221,876.80

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Solution

The fourth proportional to 720,512.80, 1,080,769.20 and 221,876.80 is: 332,815.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,512.80 : 1,080,769.20 = 221,876.80 : x
  2. Step 2: Convert to fraction form
    720,512.80/1,080,769.20 = 221,876.80/x
  3. Step 3: Cross multiply
    720,512.80x = 1,080,769.20 × 221,876.80
  4. Step 4: Simplify right side
    720,512.80x = 239,797,611,634.56
  5. Step 5: Solve for x
    x = 239,797,611,634.56/720,512.80
  6. Step 6: Final answer
    x = 332,815.20

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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.