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Finding the Fourth Proportional to 330.02, 494.22 and 320.75

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Solution

The fourth proportional to 330.02, 494.22 and 320.75 is: 480.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.02 : 494.22 = 320.75 : x
  2. Step 2: Convert to fraction form
    330.02/494.22 = 320.75/x
  3. Step 3: Cross multiply
    330.02x = 494.22 × 320.75
  4. Step 4: Simplify right side
    330.02x = 158,521.07
  5. Step 5: Solve for x
    x = 158,521.07/330.02
  6. Step 6: Final answer
    x = 480.34

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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.