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Finding the Fourth Proportional to 331.16, 494.18 and 294.80

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Solution

The fourth proportional to 331.16, 494.18 and 294.80 is: 439.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.16 : 494.18 = 294.80 : x
  2. Step 2: Convert to fraction form
    331.16/494.18 = 294.80/x
  3. Step 3: Cross multiply
    331.16x = 494.18 × 294.80
  4. Step 4: Simplify right side
    331.16x = 145,684.26
  5. Step 5: Solve for x
    x = 145,684.26/331.16
  6. Step 6: Final answer
    x = 439.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.