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Finding the Fourth Proportional to 253.72, 350.15 and 154.17

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Solution

The fourth proportional to 253.72, 350.15 and 154.17 is: 212.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.72 : 350.15 = 154.17 : x
  2. Step 2: Convert to fraction form
    253.72/350.15 = 154.17/x
  3. Step 3: Cross multiply
    253.72x = 350.15 × 154.17
  4. Step 4: Simplify right side
    253.72x = 53,982.63
  5. Step 5: Solve for x
    x = 53,982.63/253.72
  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.