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Finding the Fourth Proportional to 392.21, 540.75 and 325.89

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Solution

The fourth proportional to 392.21, 540.75 and 325.89 is: 449.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.21 : 540.75 = 325.89 : x
  2. Step 2: Convert to fraction form
    392.21/540.75 = 325.89/x
  3. Step 3: Cross multiply
    392.21x = 540.75 × 325.89
  4. Step 4: Simplify right side
    392.21x = 176,226.24
  5. Step 5: Solve for x
    x = 176,226.24/392.21
  6. Step 6: Final answer
    x = 449.32

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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.