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Finding the Fourth Proportional to 192.55, 288.72 and 131.75

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Solution

The fourth proportional to 192.55, 288.72 and 131.75 is: 197.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.55 : 288.72 = 131.75 : x
  2. Step 2: Convert to fraction form
    192.55/288.72 = 131.75/x
  3. Step 3: Cross multiply
    192.55x = 288.72 × 131.75
  4. Step 4: Simplify right side
    192.55x = 38,038.86
  5. Step 5: Solve for x
    x = 38,038.86/192.55
  6. Step 6: Final answer
    x = 197.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.