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Finding the Fourth Proportional to 290.96, 401.04 and 228.80

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Solution

The fourth proportional to 290.96, 401.04 and 228.80 is: 315.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.96 : 401.04 = 228.80 : x
  2. Step 2: Convert to fraction form
    290.96/401.04 = 228.80/x
  3. Step 3: Cross multiply
    290.96x = 401.04 × 228.80
  4. Step 4: Simplify right side
    290.96x = 91,757.95
  5. Step 5: Solve for x
    x = 91,757.95/290.96
  6. Step 6: Final answer
    x = 315.36

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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.