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Finding the Fourth Proportional to 221.75, 305.87 and 147.06

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Solution

The fourth proportional to 221.75, 305.87 and 147.06 is: 202.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.75 : 305.87 = 147.06 : x
  2. Step 2: Convert to fraction form
    221.75/305.87 = 147.06/x
  3. Step 3: Cross multiply
    221.75x = 305.87 × 147.06
  4. Step 4: Simplify right side
    221.75x = 44,980.51
  5. Step 5: Solve for x
    x = 44,980.51/221.75
  6. Step 6: Final answer
    x = 202.84

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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.