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Finding the Fourth Proportional to 400.11, 600.40 and 180.67

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Solution

The fourth proportional to 400.11, 600.40 and 180.67 is: 271.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.11 : 600.40 = 180.67 : x
  2. Step 2: Convert to fraction form
    400.11/600.40 = 180.67/x
  3. Step 3: Cross multiply
    400.11x = 600.40 × 180.67
  4. Step 4: Simplify right side
    400.11x = 108,474.27
  5. Step 5: Solve for x
    x = 108,474.27/400.11
  6. Step 6: Final answer
    x = 271.11

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Why These Related Problems?

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