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Finding the Fourth Proportional to 313.91, 433.04 and 272.40

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Solution

The fourth proportional to 313.91, 433.04 and 272.40 is: 375.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.91 : 433.04 = 272.40 : x
  2. Step 2: Convert to fraction form
    313.91/433.04 = 272.40/x
  3. Step 3: Cross multiply
    313.91x = 433.04 × 272.40
  4. Step 4: Simplify right side
    313.91x = 117,958.73
  5. Step 5: Solve for x
    x = 117,958.73/313.91
  6. Step 6: Final answer
    x = 375.78

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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.