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Finding the Fourth Proportional to 272.25, 375.62 and 154.21

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Solution

The fourth proportional to 272.25, 375.62 and 154.21 is: 212.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.25 : 375.62 = 154.21 : x
  2. Step 2: Convert to fraction form
    272.25/375.62 = 154.21/x
  3. Step 3: Cross multiply
    272.25x = 375.62 × 154.21
  4. Step 4: Simplify right side
    272.25x = 57,924.36
  5. Step 5: Solve for x
    x = 57,924.36/272.25
  6. Step 6: Final answer
    x = 212.76

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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.