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Finding the Fourth Proportional to 251.03, 346.58 and 198.79

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Solution

The fourth proportional to 251.03, 346.58 and 198.79 is: 274.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.03 : 346.58 = 198.79 : x
  2. Step 2: Convert to fraction form
    251.03/346.58 = 198.79/x
  3. Step 3: Cross multiply
    251.03x = 346.58 × 198.79
  4. Step 4: Simplify right side
    251.03x = 68,895.52
  5. Step 5: Solve for x
    x = 68,895.52/251.03
  6. Step 6: Final answer
    x = 274.45

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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.