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Finding the Fourth Proportional to 392.12, 540.60 and 325.48

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Solution

The fourth proportional to 392.12, 540.60 and 325.48 is: 448.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.12 : 540.60 = 325.48 : x
  2. Step 2: Convert to fraction form
    392.12/540.60 = 325.48/x
  3. Step 3: Cross multiply
    392.12x = 540.60 × 325.48
  4. Step 4: Simplify right side
    392.12x = 175,954.49
  5. Step 5: Solve for x
    x = 175,954.49/392.12
  6. Step 6: Final answer
    x = 448.73

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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.