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Finding the Fourth Proportional to 199.60, 298.86 and 118.30

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Solution

The fourth proportional to 199.60, 298.86 and 118.30 is: 177.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.60 : 298.86 = 118.30 : x
  2. Step 2: Convert to fraction form
    199.60/298.86 = 118.30/x
  3. Step 3: Cross multiply
    199.60x = 298.86 × 118.30
  4. Step 4: Simplify right side
    199.60x = 35,355.14
  5. Step 5: Solve for x
    x = 35,355.14/199.60
  6. Step 6: Final answer
    x = 177.13

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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.