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Finding the Fourth Proportional to 303.40, 418.66 and 187

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Solution

The fourth proportional to 303.40, 418.66 and 187 is: 258.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.40 : 418.66 = 187 : x
  2. Step 2: Convert to fraction form
    303.40/418.66 = 187/x
  3. Step 3: Cross multiply
    303.40x = 418.66 × 187
  4. Step 4: Simplify right side
    303.40x = 78,289.42
  5. Step 5: Solve for x
    x = 78,289.42/303.40
  6. Step 6: Final answer
    x = 258.04

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.