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Finding the Fourth Proportional to 198.77, 297.98 and 68.72

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Solution

The fourth proportional to 198.77, 297.98 and 68.72 is: 103.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.77 : 297.98 = 68.72 : x
  2. Step 2: Convert to fraction form
    198.77/297.98 = 68.72/x
  3. Step 3: Cross multiply
    198.77x = 297.98 × 68.72
  4. Step 4: Simplify right side
    198.77x = 20,475.35
  5. Step 5: Solve for x
    x = 20,475.35/198.77
  6. Step 6: Final answer
    x = 103.01

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.