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Finding the Fourth Proportional to 291.49, 401.97 and 186.55

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Solution

The fourth proportional to 291.49, 401.97 and 186.55 is: 257.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.49 : 401.97 = 186.55 : x
  2. Step 2: Convert to fraction form
    291.49/401.97 = 186.55/x
  3. Step 3: Cross multiply
    291.49x = 401.97 × 186.55
  4. Step 4: Simplify right side
    291.49x = 74,987.20
  5. Step 5: Solve for x
    x = 74,987.20/291.49
  6. Step 6: Final answer
    x = 257.26

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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.