Home / 520,819.20-781,301.70-221,297.40

Finding the Fourth Proportional to 520,819.20, 781,301.70 and 221,297.40

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Solution

The fourth proportional to 520,819.20, 781,301.70 and 221,297.40 is: 331,977.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,819.20 : 781,301.70 = 221,297.40 : x
  2. Step 2: Convert to fraction form
    520,819.20/781,301.70 = 221,297.40/x
  3. Step 3: Cross multiply
    520,819.20x = 781,301.70 × 221,297.40
  4. Step 4: Simplify right side
    520,819.20x = 172,900,034,825.58
  5. Step 5: Solve for x
    x = 172,900,034,825.58/520,819.20
  6. Step 6: Final answer
    x = 331,977.08

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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.