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Finding the Fourth Proportional to 192.16, 287.52 and 140.95

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Solution

The fourth proportional to 192.16, 287.52 and 140.95 is: 210.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.16 : 287.52 = 140.95 : x
  2. Step 2: Convert to fraction form
    192.16/287.52 = 140.95/x
  3. Step 3: Cross multiply
    192.16x = 287.52 × 140.95
  4. Step 4: Simplify right side
    192.16x = 40,525.94
  5. Step 5: Solve for x
    x = 40,525.94/192.16
  6. Step 6: Final answer
    x = 210.90

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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.