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Finding the Fourth Proportional to 330.78, 496.22 and 114.30

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Solution

The fourth proportional to 330.78, 496.22 and 114.30 is: 171.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.78 : 496.22 = 114.30 : x
  2. Step 2: Convert to fraction form
    330.78/496.22 = 114.30/x
  3. Step 3: Cross multiply
    330.78x = 496.22 × 114.30
  4. Step 4: Simplify right side
    330.78x = 56,717.95
  5. Step 5: Solve for x
    x = 56,717.95/330.78
  6. Step 6: Final answer
    x = 171.47

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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.