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Finding the Fourth Proportional to 331.33, 494.63 and 279.61

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Solution

The fourth proportional to 331.33, 494.63 and 279.61 is: 417.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.33 : 494.63 = 279.61 : x
  2. Step 2: Convert to fraction form
    331.33/494.63 = 279.61/x
  3. Step 3: Cross multiply
    331.33x = 494.63 × 279.61
  4. Step 4: Simplify right side
    331.33x = 138,303.49
  5. Step 5: Solve for x
    x = 138,303.49/331.33
  6. Step 6: Final answer
    x = 417.42

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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.