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Finding the Fourth Proportional to 431,391.60, 647,030.70 and 131,902.20

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Solution

The fourth proportional to 431,391.60, 647,030.70 and 131,902.20 is: 197,835.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,391.60 : 647,030.70 = 131,902.20 : x
  2. Step 2: Convert to fraction form
    431,391.60/647,030.70 = 131,902.20/x
  3. Step 3: Cross multiply
    431,391.60x = 647,030.70 × 131,902.20
  4. Step 4: Simplify right side
    431,391.60x = 85,344,772,797.54
  5. Step 5: Solve for x
    x = 85,344,772,797.54/431,391.60
  6. Step 6: Final answer
    x = 197,835.96

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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.