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Finding the Fourth Proportional to 271.77, 375.12 and 155.40

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Solution

The fourth proportional to 271.77, 375.12 and 155.40 is: 214.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.77 : 375.12 = 155.40 : x
  2. Step 2: Convert to fraction form
    271.77/375.12 = 155.40/x
  3. Step 3: Cross multiply
    271.77x = 375.12 × 155.40
  4. Step 4: Simplify right side
    271.77x = 58,293.65
  5. Step 5: Solve for x
    x = 58,293.65/271.77
  6. Step 6: Final answer
    x = 214.50

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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.