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Finding the Fourth Proportional to 399.02, 550.41 and 243.50

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Solution

The fourth proportional to 399.02, 550.41 and 243.50 is: 335.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.02 : 550.41 = 243.50 : x
  2. Step 2: Convert to fraction form
    399.02/550.41 = 243.50/x
  3. Step 3: Cross multiply
    399.02x = 550.41 × 243.50
  4. Step 4: Simplify right side
    399.02x = 134,024.84
  5. Step 5: Solve for x
    x = 134,024.84/399.02
  6. Step 6: Final answer
    x = 335.89

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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.