Home / 521,109.80-781,956.30-221,539.40

Finding the Fourth Proportional to 521,109.80, 781,956.30 and 221,539.40

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Solution

The fourth proportional to 521,109.80, 781,956.30 and 221,539.40 is: 332,433.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,109.80 : 781,956.30 = 221,539.40 : x
  2. Step 2: Convert to fraction form
    521,109.80/781,956.30 = 221,539.40/x
  3. Step 3: Cross multiply
    521,109.80x = 781,956.30 × 221,539.40
  4. Step 4: Simplify right side
    521,109.80x = 173,234,129,528.22
  5. Step 5: Solve for x
    x = 173,234,129,528.22/521,109.80
  6. Step 6: Final answer
    x = 332,433.07

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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.