Home / 521,112.30-781,704.90-205,528.20

Finding the Fourth Proportional to 521,112.30, 781,704.90 and 205,528.20

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Solution

The fourth proportional to 521,112.30, 781,704.90 and 205,528.20 is: 308,306.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,112.30 : 781,704.90 = 205,528.20 : x
  2. Step 2: Convert to fraction form
    521,112.30/781,704.90 = 205,528.20/x
  3. Step 3: Cross multiply
    521,112.30x = 781,704.90 × 205,528.20
  4. Step 4: Simplify right side
    521,112.30x = 160,662,401,028.18
  5. Step 5: Solve for x
    x = 160,662,401,028.18/521,112.30
  6. Step 6: Final answer
    x = 308,306.68

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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.