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Finding the Fourth Proportional to 331.29, 494.51 and 290.18

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Solution

The fourth proportional to 331.29, 494.51 and 290.18 is: 433.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.29 : 494.51 = 290.18 : x
  2. Step 2: Convert to fraction form
    331.29/494.51 = 290.18/x
  3. Step 3: Cross multiply
    331.29x = 494.51 × 290.18
  4. Step 4: Simplify right side
    331.29x = 143,496.70
  5. Step 5: Solve for x
    x = 143,496.70/331.29
  6. Step 6: Final answer
    x = 433.15

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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.