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Finding the Fourth Proportional to 192.64, 287.60 and 171.04

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Solution

The fourth proportional to 192.64, 287.60 and 171.04 is: 255.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.64 : 287.60 = 171.04 : x
  2. Step 2: Convert to fraction form
    192.64/287.60 = 171.04/x
  3. Step 3: Cross multiply
    192.64x = 287.60 × 171.04
  4. Step 4: Simplify right side
    192.64x = 49,191.10
  5. Step 5: Solve for x
    x = 49,191.10/192.64
  6. Step 6: Final answer
    x = 255.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.