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Finding the Fourth Proportional to 272.40, 376.18 and 217.52

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Solution

The fourth proportional to 272.40, 376.18 and 217.52 is: 300.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.40 : 376.18 = 217.52 : x
  2. Step 2: Convert to fraction form
    272.40/376.18 = 217.52/x
  3. Step 3: Cross multiply
    272.40x = 376.18 × 217.52
  4. Step 4: Simplify right side
    272.40x = 81,826.67
  5. Step 5: Solve for x
    x = 81,826.67/272.40
  6. Step 6: Final answer
    x = 300.39

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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.