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Finding the Fourth Proportional to 271.47, 374.59 and 153.43

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Solution

The fourth proportional to 271.47, 374.59 and 153.43 is: 211.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.47 : 374.59 = 153.43 : x
  2. Step 2: Convert to fraction form
    271.47/374.59 = 153.43/x
  3. Step 3: Cross multiply
    271.47x = 374.59 × 153.43
  4. Step 4: Simplify right side
    271.47x = 57,474.71
  5. Step 5: Solve for x
    x = 57,474.71/271.47
  6. Step 6: Final answer
    x = 211.71

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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.