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Finding the Fourth Proportional to 399.82, 599.43 and 194.20

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Solution

The fourth proportional to 399.82, 599.43 and 194.20 is: 291.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.82 : 599.43 = 194.20 : x
  2. Step 2: Convert to fraction form
    399.82/599.43 = 194.20/x
  3. Step 3: Cross multiply
    399.82x = 599.43 × 194.20
  4. Step 4: Simplify right side
    399.82x = 116,409.31
  5. Step 5: Solve for x
    x = 116,409.31/399.82
  6. Step 6: Final answer
    x = 291.15

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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.