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Finding the Fourth Proportional to 266.22, 398.76 and 214.58

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Solution

The fourth proportional to 266.22, 398.76 and 214.58 is: 321.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.22 : 398.76 = 214.58 : x
  2. Step 2: Convert to fraction form
    266.22/398.76 = 214.58/x
  3. Step 3: Cross multiply
    266.22x = 398.76 × 214.58
  4. Step 4: Simplify right side
    266.22x = 85,565.92
  5. Step 5: Solve for x
    x = 85,565.92/266.22
  6. Step 6: Final answer
    x = 321.41

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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.