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Finding the Fourth Proportional to 288.84, 398.04 and 201.36

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Solution

The fourth proportional to 288.84, 398.04 and 201.36 is: 277.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.84 : 398.04 = 201.36 : x
  2. Step 2: Convert to fraction form
    288.84/398.04 = 201.36/x
  3. Step 3: Cross multiply
    288.84x = 398.04 × 201.36
  4. Step 4: Simplify right side
    288.84x = 80,149.33
  5. Step 5: Solve for x
    x = 80,149.33/288.84
  6. Step 6: Final answer
    x = 277.49

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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.