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Finding the Fourth Proportional to 397,422.55, 548,431.37 and 225,356.22

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Solution

The fourth proportional to 397,422.55, 548,431.37 and 225,356.22 is: 310,984.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,422.55 : 548,431.37 = 225,356.22 : x
  2. Step 2: Convert to fraction form
    397,422.55/548,431.37 = 225,356.22/x
  3. Step 3: Cross multiply
    397,422.55x = 548,431.37 × 225,356.22
  4. Step 4: Simplify right side
    397,422.55x = 123,592,420,190.93
  5. Step 5: Solve for x
    x = 123,592,420,190.93/397,422.55
  6. Step 6: Final answer
    x = 310,984.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.