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Finding the Fourth Proportional to 401.95, 554.78 and 236.21

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Solution

The fourth proportional to 401.95, 554.78 and 236.21 is: 326.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.95 : 554.78 = 236.21 : x
  2. Step 2: Convert to fraction form
    401.95/554.78 = 236.21/x
  3. Step 3: Cross multiply
    401.95x = 554.78 × 236.21
  4. Step 4: Simplify right side
    401.95x = 131,045.30
  5. Step 5: Solve for x
    x = 131,045.30/401.95
  6. Step 6: Final answer
    x = 326.03

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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.