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Finding the Fourth Proportional to 399.86, 550.60 and 362.79

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Solution

The fourth proportional to 399.86, 550.60 and 362.79 is: 499.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.86 : 550.60 = 362.79 : x
  2. Step 2: Convert to fraction form
    399.86/550.60 = 362.79/x
  3. Step 3: Cross multiply
    399.86x = 550.60 × 362.79
  4. Step 4: Simplify right side
    399.86x = 199,752.17
  5. Step 5: Solve for x
    x = 199,752.17/399.86
  6. Step 6: Final answer
    x = 499.56

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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.