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Finding the Fourth Proportional to 521,351.80, 782,027.70 and 221,842.15

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Solution

The fourth proportional to 521,351.80, 782,027.70 and 221,842.15 is: 332,763.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,351.80 : 782,027.70 = 221,842.15 : x
  2. Step 2: Convert to fraction form
    521,351.80/782,027.70 = 221,842.15/x
  3. Step 3: Cross multiply
    521,351.80x = 782,027.70 × 221,842.15
  4. Step 4: Simplify right side
    521,351.80x = 173,486,706,327.56
  5. Step 5: Solve for x
    x = 173,486,706,327.56/521,351.80
  6. Step 6: Final answer
    x = 332,763.23

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Similar ratio
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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.