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Finding the Fourth Proportional to 272.42, 375.85 and 155.96

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Solution

The fourth proportional to 272.42, 375.85 and 155.96 is: 215.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.42 : 375.85 = 155.96 : x
  2. Step 2: Convert to fraction form
    272.42/375.85 = 155.96/x
  3. Step 3: Cross multiply
    272.42x = 375.85 × 155.96
  4. Step 4: Simplify right side
    272.42x = 58,617.57
  5. Step 5: Solve for x
    x = 58,617.57/272.42
  6. Step 6: Final answer
    x = 215.17

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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.