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Finding the Fourth Proportional to 268.81, 400.88 and 239.32

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Solution

The fourth proportional to 268.81, 400.88 and 239.32 is: 356.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.81 : 400.88 = 239.32 : x
  2. Step 2: Convert to fraction form
    268.81/400.88 = 239.32/x
  3. Step 3: Cross multiply
    268.81x = 400.88 × 239.32
  4. Step 4: Simplify right side
    268.81x = 95,938.60
  5. Step 5: Solve for x
    x = 95,938.60/268.81
  6. Step 6: Final answer
    x = 356.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.