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Finding the Fourth Proportional to 318.72, 441.04 and 272.02

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Solution

The fourth proportional to 318.72, 441.04 and 272.02 is: 376.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.72 : 441.04 = 272.02 : x
  2. Step 2: Convert to fraction form
    318.72/441.04 = 272.02/x
  3. Step 3: Cross multiply
    318.72x = 441.04 × 272.02
  4. Step 4: Simplify right side
    318.72x = 119,971.70
  5. Step 5: Solve for x
    x = 119,971.70/318.72
  6. Step 6: Final answer
    x = 376.42

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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.