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Finding the Fourth Proportional to 201.92, 279.02 and 155.24

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Solution

The fourth proportional to 201.92, 279.02 and 155.24 is: 214.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.92 : 279.02 = 155.24 : x
  2. Step 2: Convert to fraction form
    201.92/279.02 = 155.24/x
  3. Step 3: Cross multiply
    201.92x = 279.02 × 155.24
  4. Step 4: Simplify right side
    201.92x = 43,315.06
  5. Step 5: Solve for x
    x = 43,315.06/201.92
  6. Step 6: Final answer
    x = 214.52

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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.