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Finding the Fourth Proportional to 272, 375.39 and 155.57

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Solution

The fourth proportional to 272, 375.39 and 155.57 is: 214.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    272 : 375.39 = 155.57 : x
  2. Step 2: Convert to fraction form
    272/375.39 = 155.57/x
  3. Step 3: Cross multiply
    272x = 375.39 × 155.57
  4. Step 4: Simplify right side
    272x = 58,399.42
  5. Step 5: Solve for x
    x = 58,399.42/272
  6. Step 6: Final answer
    x = 214.70

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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.