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Finding the Fourth Proportional to 285.35, 393.65 and 192.13

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Solution

The fourth proportional to 285.35, 393.65 and 192.13 is: 265.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.35 : 393.65 = 192.13 : x
  2. Step 2: Convert to fraction form
    285.35/393.65 = 192.13/x
  3. Step 3: Cross multiply
    285.35x = 393.65 × 192.13
  4. Step 4: Simplify right side
    285.35x = 75,629.05
  5. Step 5: Solve for x
    x = 75,629.05/285.35
  6. Step 6: Final answer
    x = 265.04

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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.