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Finding the Fourth Proportional to 330.05, 494.76 and 113.57

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Solution

The fourth proportional to 330.05, 494.76 and 113.57 is: 170.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.05 : 494.76 = 113.57 : x
  2. Step 2: Convert to fraction form
    330.05/494.76 = 113.57/x
  3. Step 3: Cross multiply
    330.05x = 494.76 × 113.57
  4. Step 4: Simplify right side
    330.05x = 56,189.89
  5. Step 5: Solve for x
    x = 56,189.89/330.05
  6. Step 6: Final answer
    x = 170.25

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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.