Home / 520,849.20-781,346.70-221,327.40

Finding the Fourth Proportional to 520,849.20, 781,346.70 and 221,327.40

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Solution

The fourth proportional to 520,849.20, 781,346.70 and 221,327.40 is: 332,022.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,849.20 : 781,346.70 = 221,327.40 : x
  2. Step 2: Convert to fraction form
    520,849.20/781,346.70 = 221,327.40/x
  3. Step 3: Cross multiply
    520,849.20x = 781,346.70 × 221,327.40
  4. Step 4: Simplify right side
    520,849.20x = 172,933,433,609.58
  5. Step 5: Solve for x
    x = 172,933,433,609.58/520,849.20
  6. Step 6: Final answer
    x = 332,022.08

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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.