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Finding the Fourth Proportional to 271.60, 374.80 and 155.17

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Solution

The fourth proportional to 271.60, 374.80 and 155.17 is: 214.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.60 : 374.80 = 155.17 : x
  2. Step 2: Convert to fraction form
    271.60/374.80 = 155.17/x
  3. Step 3: Cross multiply
    271.60x = 374.80 × 155.17
  4. Step 4: Simplify right side
    271.60x = 58,155.84
  5. Step 5: Solve for x
    x = 58,155.84/271.60
  6. Step 6: Final answer
    x = 214.13

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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.