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Finding the Fourth Proportional to 400.16, 600.32 and 126.25

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Solution

The fourth proportional to 400.16, 600.32 and 126.25 is: 189.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.16 : 600.32 = 126.25 : x
  2. Step 2: Convert to fraction form
    400.16/600.32 = 126.25/x
  3. Step 3: Cross multiply
    400.16x = 600.32 × 126.25
  4. Step 4: Simplify right side
    400.16x = 75,789.21
  5. Step 5: Solve for x
    x = 75,789.21/400.16
  6. Step 6: Final answer
    x = 189.40

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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.