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Finding the Fourth Proportional to 285.36, 393.39 and 192.06

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Solution

The fourth proportional to 285.36, 393.39 and 192.06 is: 264.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.36 : 393.39 = 192.06 : x
  2. Step 2: Convert to fraction form
    285.36/393.39 = 192.06/x
  3. Step 3: Cross multiply
    285.36x = 393.39 × 192.06
  4. Step 4: Simplify right side
    285.36x = 75,554.48
  5. Step 5: Solve for x
    x = 75,554.48/285.36
  6. Step 6: Final answer
    x = 264.77

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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.