Home / 327,122.78-489,896.82-221,621.90

Finding the Fourth Proportional to 327,122.78, 489,896.82 and 221,621.90

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Solution

The fourth proportional to 327,122.78, 489,896.82 and 221,621.90 is: 331,899.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,122.78 : 489,896.82 = 221,621.90 : x
  2. Step 2: Convert to fraction form
    327,122.78/489,896.82 = 221,621.90/x
  3. Step 3: Cross multiply
    327,122.78x = 489,896.82 × 221,621.90
  4. Step 4: Simplify right side
    327,122.78x = 108,571,861,602.87
  5. Step 5: Solve for x
    x = 108,571,861,602.87/327,122.78
  6. Step 6: Final answer
    x = 331,899.43

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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.