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Finding the Fourth Proportional to 271.61, 374.78 and 153.57

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Solution

The fourth proportional to 271.61, 374.78 and 153.57 is: 211.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.61 : 374.78 = 153.57 : x
  2. Step 2: Convert to fraction form
    271.61/374.78 = 153.57/x
  3. Step 3: Cross multiply
    271.61x = 374.78 × 153.57
  4. Step 4: Simplify right side
    271.61x = 57,554.96
  5. Step 5: Solve for x
    x = 57,554.96/271.61
  6. Step 6: Final answer
    x = 211.91

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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.