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Finding the Fourth Proportional to 540,791.20, 809,631.60 and 330,839.20

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Solution

The fourth proportional to 540,791.20, 809,631.60 and 330,839.20 is: 495,307.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,791.20 : 809,631.60 = 330,839.20 : x
  2. Step 2: Convert to fraction form
    540,791.20/809,631.60 = 330,839.20/x
  3. Step 3: Cross multiply
    540,791.20x = 809,631.60 × 330,839.20
  4. Step 4: Simplify right side
    540,791.20x = 267,857,870,838.72
  5. Step 5: Solve for x
    x = 267,857,870,838.72/540,791.20
  6. Step 6: Final answer
    x = 495,307.38

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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.