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Finding the Fourth Proportional to 398.93, 550.42 and 268.32

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Solution

The fourth proportional to 398.93, 550.42 and 268.32 is: 370.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.93 : 550.42 = 268.32 : x
  2. Step 2: Convert to fraction form
    398.93/550.42 = 268.32/x
  3. Step 3: Cross multiply
    398.93x = 550.42 × 268.32
  4. Step 4: Simplify right side
    398.93x = 147,688.02
  5. Step 5: Solve for x
    x = 147,688.02/398.93
  6. Step 6: Final answer
    x = 370.21

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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.