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Finding the Fourth Proportional to 289.36, 398.82 and 236.98

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Solution

The fourth proportional to 289.36, 398.82 and 236.98 is: 326.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.36 : 398.82 = 236.98 : x
  2. Step 2: Convert to fraction form
    289.36/398.82 = 236.98/x
  3. Step 3: Cross multiply
    289.36x = 398.82 × 236.98
  4. Step 4: Simplify right side
    289.36x = 94,512.36
  5. Step 5: Solve for x
    x = 94,512.36/289.36
  6. Step 6: Final answer
    x = 326.63

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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.