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Finding the Fourth Proportional to 521,491.20, 781,653.60 and 221,920.80

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Solution

The fourth proportional to 521,491.20, 781,653.60 and 221,920.80 is: 332,633.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,491.20 : 781,653.60 = 221,920.80 : x
  2. Step 2: Convert to fraction form
    521,491.20/781,653.60 = 221,920.80/x
  3. Step 3: Cross multiply
    521,491.20x = 781,653.60 × 221,920.80
  4. Step 4: Simplify right side
    521,491.20x = 173,465,192,234.88
  5. Step 5: Solve for x
    x = 173,465,192,234.88/521,491.20
  6. Step 6: Final answer
    x = 332,633.02

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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.