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Finding the Fourth Proportional to 221.05, 305.30 and 147.23

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Solution

The fourth proportional to 221.05, 305.30 and 147.23 is: 203.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.05 : 305.30 = 147.23 : x
  2. Step 2: Convert to fraction form
    221.05/305.30 = 147.23/x
  3. Step 3: Cross multiply
    221.05x = 305.30 × 147.23
  4. Step 4: Simplify right side
    221.05x = 44,949.32
  5. Step 5: Solve for x
    x = 44,949.32/221.05
  6. Step 6: Final answer
    x = 203.34

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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.