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Finding the Fourth Proportional to 330.99, 496.49 and 157.68

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Solution

The fourth proportional to 330.99, 496.49 and 157.68 is: 236.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.99 : 496.49 = 157.68 : x
  2. Step 2: Convert to fraction form
    330.99/496.49 = 157.68/x
  3. Step 3: Cross multiply
    330.99x = 496.49 × 157.68
  4. Step 4: Simplify right side
    330.99x = 78,284.06
  5. Step 5: Solve for x
    x = 78,284.06/330.99
  6. Step 6: Final answer
    x = 236.51

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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.