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Finding the Fourth Proportional to 251.70, 347.68 and 194.20

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Solution

The fourth proportional to 251.70, 347.68 and 194.20 is: 268.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.70 : 347.68 = 194.20 : x
  2. Step 2: Convert to fraction form
    251.70/347.68 = 194.20/x
  3. Step 3: Cross multiply
    251.70x = 347.68 × 194.20
  4. Step 4: Simplify right side
    251.70x = 67,519.46
  5. Step 5: Solve for x
    x = 67,519.46/251.70
  6. Step 6: Final answer
    x = 268.25

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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.