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Finding the Fourth Proportional to 399.19, 549.56 and 349.99

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Solution

The fourth proportional to 399.19, 549.56 and 349.99 is: 481.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.19 : 549.56 = 349.99 : x
  2. Step 2: Convert to fraction form
    399.19/549.56 = 349.99/x
  3. Step 3: Cross multiply
    399.19x = 549.56 × 349.99
  4. Step 4: Simplify right side
    399.19x = 192,340.50
  5. Step 5: Solve for x
    x = 192,340.50/399.19
  6. Step 6: Final answer
    x = 481.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.