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Finding the Fourth Proportional to 192, 264.78 and 155.01

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Solution

The fourth proportional to 192, 264.78 and 155.01 is: 213.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    192 : 264.78 = 155.01 : x
  2. Step 2: Convert to fraction form
    192/264.78 = 155.01/x
  3. Step 3: Cross multiply
    192x = 264.78 × 155.01
  4. Step 4: Simplify right side
    192x = 41,043.55
  5. Step 5: Solve for x
    x = 41,043.55/192
  6. Step 6: Final answer
    x = 213.77

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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.