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Finding the Fourth Proportional to 400.09, 600.19 and 111.53

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Solution

The fourth proportional to 400.09, 600.19 and 111.53 is: 167.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.09 : 600.19 = 111.53 : x
  2. Step 2: Convert to fraction form
    400.09/600.19 = 111.53/x
  3. Step 3: Cross multiply
    400.09x = 600.19 × 111.53
  4. Step 4: Simplify right side
    400.09x = 66,939.19
  5. Step 5: Solve for x
    x = 66,939.19/400.09
  6. Step 6: Final answer
    x = 167.31

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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.