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Finding the Fourth Proportional to 285.25, 393.46 and 190.73

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Solution

The fourth proportional to 285.25, 393.46 and 190.73 is: 263.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.25 : 393.46 = 190.73 : x
  2. Step 2: Convert to fraction form
    285.25/393.46 = 190.73/x
  3. Step 3: Cross multiply
    285.25x = 393.46 × 190.73
  4. Step 4: Simplify right side
    285.25x = 75,042.18
  5. Step 5: Solve for x
    x = 75,042.18/285.25
  6. Step 6: Final answer
    x = 263.08

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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.