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Finding the Fourth Proportional to 399.67, 599.67 and 216.85

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Solution

The fourth proportional to 399.67, 599.67 and 216.85 is: 325.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.67 : 599.67 = 216.85 : x
  2. Step 2: Convert to fraction form
    399.67/599.67 = 216.85/x
  3. Step 3: Cross multiply
    399.67x = 599.67 × 216.85
  4. Step 4: Simplify right side
    399.67x = 130,038.44
  5. Step 5: Solve for x
    x = 130,038.44/399.67
  6. Step 6: Final answer
    x = 325.36

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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.