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Finding the Fourth Proportional to 400.72, 600.96 and 112.16

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Solution

The fourth proportional to 400.72, 600.96 and 112.16 is: 168.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.72 : 600.96 = 112.16 : x
  2. Step 2: Convert to fraction form
    400.72/600.96 = 112.16/x
  3. Step 3: Cross multiply
    400.72x = 600.96 × 112.16
  4. Step 4: Simplify right side
    400.72x = 67,403.67
  5. Step 5: Solve for x
    x = 67,403.67/400.72
  6. Step 6: Final answer
    x = 168.21

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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.