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Finding the Fourth Proportional to 399.92, 550.69 and 334.31

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Solution

The fourth proportional to 399.92, 550.69 and 334.31 is: 460.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.92 : 550.69 = 334.31 : x
  2. Step 2: Convert to fraction form
    399.92/550.69 = 334.31/x
  3. Step 3: Cross multiply
    399.92x = 550.69 × 334.31
  4. Step 4: Simplify right side
    399.92x = 184,101.17
  5. Step 5: Solve for x
    x = 184,101.17/399.92
  6. Step 6: Final answer
    x = 460.35

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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.