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Finding the Fourth Proportional to 221.00, 303.26 and 212.81

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Solution

The fourth proportional to 221.00, 303.26 and 212.81 is: 292.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.00 : 303.26 = 212.81 : x
  2. Step 2: Convert to fraction form
    221.00/303.26 = 212.81/x
  3. Step 3: Cross multiply
    221.00x = 303.26 × 212.81
  4. Step 4: Simplify right side
    221.00x = 64,534.18
  5. Step 5: Solve for x
    x = 64,534.18/221.00
  6. Step 6: Final answer
    x = 292.02

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.