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Finding the Fourth Proportional to 187.20, 271.20 and 187.20

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Solution

The fourth proportional to 187.20, 271.20 and 187.20 is: 271.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.20 : 271.20 = 187.20 : x
  2. Step 2: Convert to fraction form
    187.20/271.20 = 187.20/x
  3. Step 3: Cross multiply
    187.20x = 271.20 × 187.20
  4. Step 4: Simplify right side
    187.20x = 50,768.64
  5. Step 5: Solve for x
    x = 50,768.64/187.20
  6. Step 6: Final answer
    x = 271.20

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.