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Finding the Fourth Proportional to 431,571.95, 647,330.79 and 132,028.73

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Solution

The fourth proportional to 431,571.95, 647,330.79 and 132,028.73 is: 198,034.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,571.95 : 647,330.79 = 132,028.73 : x
  2. Step 2: Convert to fraction form
    431,571.95/647,330.79 = 132,028.73/x
  3. Step 3: Cross multiply
    431,571.95x = 647,330.79 × 132,028.73
  4. Step 4: Simplify right side
    431,571.95x = 85,466,262,093.60
  5. Step 5: Solve for x
    x = 85,466,262,093.60/431,571.95
  6. Step 6: Final answer
    x = 198,034.79

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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.