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Finding the Fourth Proportional to 268.58, 370.98 and 198.74

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Solution

The fourth proportional to 268.58, 370.98 and 198.74 is: 274.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.58 : 370.98 = 198.74 : x
  2. Step 2: Convert to fraction form
    268.58/370.98 = 198.74/x
  3. Step 3: Cross multiply
    268.58x = 370.98 × 198.74
  4. Step 4: Simplify right side
    268.58x = 73,728.57
  5. Step 5: Solve for x
    x = 73,728.57/268.58
  6. Step 6: Final answer
    x = 274.51

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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.