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Finding the Fourth Proportional to 221.88, 334.47 and 210.18

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Solution

The fourth proportional to 221.88, 334.47 and 210.18 is: 316.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.88 : 334.47 = 210.18 : x
  2. Step 2: Convert to fraction form
    221.88/334.47 = 210.18/x
  3. Step 3: Cross multiply
    221.88x = 334.47 × 210.18
  4. Step 4: Simplify right side
    221.88x = 70,298.90
  5. Step 5: Solve for x
    x = 70,298.90/221.88
  6. Step 6: Final answer
    x = 316.83

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.