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Finding the Fourth Proportional to 272.31, 375.89 and 155.94

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Solution

The fourth proportional to 272.31, 375.89 and 155.94 is: 215.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.31 : 375.89 = 155.94 : x
  2. Step 2: Convert to fraction form
    272.31/375.89 = 155.94/x
  3. Step 3: Cross multiply
    272.31x = 375.89 × 155.94
  4. Step 4: Simplify right side
    272.31x = 58,615.51
  5. Step 5: Solve for x
    x = 58,615.51/272.31
  6. Step 6: Final answer
    x = 215.25

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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.