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Finding the Fourth Proportional to 330.87, 496.43 and 159.75

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Solution

The fourth proportional to 330.87, 496.43 and 159.75 is: 239.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.87 : 496.43 = 159.75 : x
  2. Step 2: Convert to fraction form
    330.87/496.43 = 159.75/x
  3. Step 3: Cross multiply
    330.87x = 496.43 × 159.75
  4. Step 4: Simplify right side
    330.87x = 79,303.89
  5. Step 5: Solve for x
    x = 79,303.89/330.87
  6. Step 6: Final answer
    x = 239.68

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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.