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Finding the Fourth Proportional to 284.85, 393.26 and 197.37

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Solution

The fourth proportional to 284.85, 393.26 and 197.37 is: 272.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.85 : 393.26 = 197.37 : x
  2. Step 2: Convert to fraction form
    284.85/393.26 = 197.37/x
  3. Step 3: Cross multiply
    284.85x = 393.26 × 197.37
  4. Step 4: Simplify right side
    284.85x = 77,616.74
  5. Step 5: Solve for x
    x = 77,616.74/284.85
  6. Step 6: Final answer
    x = 272.48

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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.