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Finding the Fourth Proportional to 400.16, 599.96 and 217.64

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Solution

The fourth proportional to 400.16, 599.96 and 217.64 is: 326.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.16 : 599.96 = 217.64 : x
  2. Step 2: Convert to fraction form
    400.16/599.96 = 217.64/x
  3. Step 3: Cross multiply
    400.16x = 599.96 × 217.64
  4. Step 4: Simplify right side
    400.16x = 130,575.29
  5. Step 5: Solve for x
    x = 130,575.29/400.16
  6. Step 6: Final answer
    x = 326.31

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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.