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Finding the Fourth Proportional to 201.94, 279.16 and 160.78

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Solution

The fourth proportional to 201.94, 279.16 and 160.78 is: 222.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.94 : 279.16 = 160.78 : x
  2. Step 2: Convert to fraction form
    201.94/279.16 = 160.78/x
  3. Step 3: Cross multiply
    201.94x = 279.16 × 160.78
  4. Step 4: Simplify right side
    201.94x = 44,883.34
  5. Step 5: Solve for x
    x = 44,883.34/201.94
  6. Step 6: Final answer
    x = 222.26

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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.