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Finding the Fourth Proportional to 225.12, 335.70 and 192.78

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Solution

The fourth proportional to 225.12, 335.70 and 192.78 is: 287.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.12 : 335.70 = 192.78 : x
  2. Step 2: Convert to fraction form
    225.12/335.70 = 192.78/x
  3. Step 3: Cross multiply
    225.12x = 335.70 × 192.78
  4. Step 4: Simplify right side
    225.12x = 64,716.25
  5. Step 5: Solve for x
    x = 64,716.25/225.12
  6. Step 6: Final answer
    x = 287.47

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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.