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Finding the Fourth Proportional to 268.21, 400.62 and 180.82

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Solution

The fourth proportional to 268.21, 400.62 and 180.82 is: 270.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.21 : 400.62 = 180.82 : x
  2. Step 2: Convert to fraction form
    268.21/400.62 = 180.82/x
  3. Step 3: Cross multiply
    268.21x = 400.62 × 180.82
  4. Step 4: Simplify right side
    268.21x = 72,440.11
  5. Step 5: Solve for x
    x = 72,440.11/268.21
  6. Step 6: Final answer
    x = 270.09

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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.