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Finding the Fourth Proportional to 272.79, 376.35 and 154.74

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Solution

The fourth proportional to 272.79, 376.35 and 154.74 is: 213.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.79 : 376.35 = 154.74 : x
  2. Step 2: Convert to fraction form
    272.79/376.35 = 154.74/x
  3. Step 3: Cross multiply
    272.79x = 376.35 × 154.74
  4. Step 4: Simplify right side
    272.79x = 58,236.40
  5. Step 5: Solve for x
    x = 58,236.40/272.79
  6. Step 6: Final answer
    x = 213.48

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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.