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Finding the Fourth Proportional to 431,353.72, 647,007.04 and 131,834.20

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Solution

The fourth proportional to 431,353.72, 647,007.04 and 131,834.20 is: 197,744.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,353.72 : 647,007.04 = 131,834.20 : x
  2. Step 2: Convert to fraction form
    431,353.72/647,007.04 = 131,834.20/x
  3. Step 3: Cross multiply
    431,353.72x = 647,007.04 × 131,834.20
  4. Step 4: Simplify right side
    431,353.72x = 85,297,655,273.18
  5. Step 5: Solve for x
    x = 85,297,655,273.18/431,353.72
  6. Step 6: Final answer
    x = 197,744.10

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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.