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Finding the Fourth Proportional to 281.60, 388.71 and 201.94

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Solution

The fourth proportional to 281.60, 388.71 and 201.94 is: 278.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.60 : 388.71 = 201.94 : x
  2. Step 2: Convert to fraction form
    281.60/388.71 = 201.94/x
  3. Step 3: Cross multiply
    281.60x = 388.71 × 201.94
  4. Step 4: Simplify right side
    281.60x = 78,496.10
  5. Step 5: Solve for x
    x = 78,496.10/281.60
  6. Step 6: Final answer
    x = 278.75

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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.