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Finding the Fourth Proportional to 285.75, 394.38 and 192.60

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Solution

The fourth proportional to 285.75, 394.38 and 192.60 is: 265.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.75 : 394.38 = 192.60 : x
  2. Step 2: Convert to fraction form
    285.75/394.38 = 192.60/x
  3. Step 3: Cross multiply
    285.75x = 394.38 × 192.60
  4. Step 4: Simplify right side
    285.75x = 75,957.59
  5. Step 5: Solve for x
    x = 75,957.59/285.75
  6. Step 6: Final answer
    x = 265.82

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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.