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Finding the Fourth Proportional to 284.04, 391.05 and 196.56

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Solution

The fourth proportional to 284.04, 391.05 and 196.56 is: 270.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.04 : 391.05 = 196.56 : x
  2. Step 2: Convert to fraction form
    284.04/391.05 = 196.56/x
  3. Step 3: Cross multiply
    284.04x = 391.05 × 196.56
  4. Step 4: Simplify right side
    284.04x = 76,864.79
  5. Step 5: Solve for x
    x = 76,864.79/284.04
  6. Step 6: Final answer
    x = 270.61

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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.