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Finding the Fourth Proportional to 272.25, 375.72 and 155.85

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Solution

The fourth proportional to 272.25, 375.72 and 155.85 is: 215.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.25 : 375.72 = 155.85 : x
  2. Step 2: Convert to fraction form
    272.25/375.72 = 155.85/x
  3. Step 3: Cross multiply
    272.25x = 375.72 × 155.85
  4. Step 4: Simplify right side
    272.25x = 58,555.96
  5. Step 5: Solve for x
    x = 58,555.96/272.25
  6. Step 6: Final answer
    x = 215.08

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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.