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Finding the Fourth Proportional to 272.10, 374.58 and 238.84

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Solution

The fourth proportional to 272.10, 374.58 and 238.84 is: 328.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.10 : 374.58 = 238.84 : x
  2. Step 2: Convert to fraction form
    272.10/374.58 = 238.84/x
  3. Step 3: Cross multiply
    272.10x = 374.58 × 238.84
  4. Step 4: Simplify right side
    272.10x = 89,464.69
  5. Step 5: Solve for x
    x = 89,464.69/272.10
  6. Step 6: Final answer
    x = 328.79

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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.