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Finding the Fourth Proportional to 271.28, 374.38 and 153.28

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Solution

The fourth proportional to 271.28, 374.38 and 153.28 is: 211.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.28 : 374.38 = 153.28 : x
  2. Step 2: Convert to fraction form
    271.28/374.38 = 153.28/x
  3. Step 3: Cross multiply
    271.28x = 374.38 × 153.28
  4. Step 4: Simplify right side
    271.28x = 57,384.97
  5. Step 5: Solve for x
    x = 57,384.97/271.28
  6. Step 6: Final answer
    x = 211.53

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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.