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Finding the Fourth Proportional to 266.60, 400.14 and 212.36

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Solution

The fourth proportional to 266.60, 400.14 and 212.36 is: 318.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.60 : 400.14 = 212.36 : x
  2. Step 2: Convert to fraction form
    266.60/400.14 = 212.36/x
  3. Step 3: Cross multiply
    266.60x = 400.14 × 212.36
  4. Step 4: Simplify right side
    266.60x = 84,973.73
  5. Step 5: Solve for x
    x = 84,973.73/266.60
  6. Step 6: Final answer
    x = 318.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.