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Finding the Fourth Proportional to 272.72, 376.37 and 154.70

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Solution

The fourth proportional to 272.72, 376.37 and 154.70 is: 213.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.72 : 376.37 = 154.70 : x
  2. Step 2: Convert to fraction form
    272.72/376.37 = 154.70/x
  3. Step 3: Cross multiply
    272.72x = 376.37 × 154.70
  4. Step 4: Simplify right side
    272.72x = 58,223.67
  5. Step 5: Solve for x
    x = 58,223.67/272.72
  6. Step 6: Final answer
    x = 213.50

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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.