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Finding the Fourth Proportional to 271.90, 375.20 and 155.46

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Solution

The fourth proportional to 271.90, 375.20 and 155.46 is: 214.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.90 : 375.20 = 155.46 : x
  2. Step 2: Convert to fraction form
    271.90/375.20 = 155.46/x
  3. Step 3: Cross multiply
    271.90x = 375.20 × 155.46
  4. Step 4: Simplify right side
    271.90x = 58,327.81
  5. Step 5: Solve for x
    x = 58,327.81/271.90
  6. Step 6: Final answer
    x = 214.52

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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.