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Finding the Fourth Proportional to 540,964.20, 809,891.10 and 331,012.20

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Solution

The fourth proportional to 540,964.20, 809,891.10 and 331,012.20 is: 495,566.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,964.20 : 809,891.10 = 331,012.20 : x
  2. Step 2: Convert to fraction form
    540,964.20/809,891.10 = 331,012.20/x
  3. Step 3: Cross multiply
    540,964.20x = 809,891.10 × 331,012.20
  4. Step 4: Simplify right side
    540,964.20x = 268,083,834,771.42
  5. Step 5: Solve for x
    x = 268,083,834,771.42/540,964.20
  6. Step 6: Final answer
    x = 495,566.68

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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.