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Finding the Fourth Proportional to 291.43, 401.33 and 272.90

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Solution

The fourth proportional to 291.43, 401.33 and 272.90 is: 375.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.43 : 401.33 = 272.90 : x
  2. Step 2: Convert to fraction form
    291.43/401.33 = 272.90/x
  3. Step 3: Cross multiply
    291.43x = 401.33 × 272.90
  4. Step 4: Simplify right side
    291.43x = 109,524.64
  5. Step 5: Solve for x
    x = 109,524.64/291.43
  6. Step 6: Final answer
    x = 375.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.