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Finding the Fourth Proportional to 221.15, 305.03 and 147.35

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Solution

The fourth proportional to 221.15, 305.03 and 147.35 is: 203.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.15 : 305.03 = 147.35 : x
  2. Step 2: Convert to fraction form
    221.15/305.03 = 147.35/x
  3. Step 3: Cross multiply
    221.15x = 305.03 × 147.35
  4. Step 4: Simplify right side
    221.15x = 44,947.30
  5. Step 5: Solve for x
    x = 44,947.30/221.15
  6. Step 6: Final answer
    x = 203.24

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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.