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Finding the Fourth Proportional to 221.02, 304.78 and 190.04

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Solution

The fourth proportional to 221.02, 304.78 and 190.04 is: 262.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.02 : 304.78 = 190.04 : x
  2. Step 2: Convert to fraction form
    221.02/304.78 = 190.04/x
  3. Step 3: Cross multiply
    221.02x = 304.78 × 190.04
  4. Step 4: Simplify right side
    221.02x = 57,917.92
  5. Step 5: Solve for x
    x = 57,917.92/221.02
  6. Step 6: Final answer
    x = 262.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.