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Finding the Fourth Proportional to 330.98, 496.69 and 148.39

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Solution

The fourth proportional to 330.98, 496.69 and 148.39 is: 222.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.98 : 496.69 = 148.39 : x
  2. Step 2: Convert to fraction form
    330.98/496.69 = 148.39/x
  3. Step 3: Cross multiply
    330.98x = 496.69 × 148.39
  4. Step 4: Simplify right side
    330.98x = 73,703.05
  5. Step 5: Solve for x
    x = 73,703.05/330.98
  6. Step 6: Final answer
    x = 222.68

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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.