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Finding the Fourth Proportional to 287.38, 396.65 and 171.01

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Solution

The fourth proportional to 287.38, 396.65 and 171.01 is: 236.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.38 : 396.65 = 171.01 : x
  2. Step 2: Convert to fraction form
    287.38/396.65 = 171.01/x
  3. Step 3: Cross multiply
    287.38x = 396.65 × 171.01
  4. Step 4: Simplify right side
    287.38x = 67,828.28
  5. Step 5: Solve for x
    x = 67,828.28/287.38
  6. Step 6: Final answer
    x = 236.03

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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.