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Finding the Fourth Proportional to 330.39, 496.53 and 239.22

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Solution

The fourth proportional to 330.39, 496.53 and 239.22 is: 359.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.39 : 496.53 = 239.22 : x
  2. Step 2: Convert to fraction form
    330.39/496.53 = 239.22/x
  3. Step 3: Cross multiply
    330.39x = 496.53 × 239.22
  4. Step 4: Simplify right side
    330.39x = 118,779.91
  5. Step 5: Solve for x
    x = 118,779.91/330.39
  6. Step 6: Final answer
    x = 359.51

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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.