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Finding the Fourth Proportional to 222.15, 306.43 and 147.46

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Solution

The fourth proportional to 222.15, 306.43 and 147.46 is: 203.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.15 : 306.43 = 147.46 : x
  2. Step 2: Convert to fraction form
    222.15/306.43 = 147.46/x
  3. Step 3: Cross multiply
    222.15x = 306.43 × 147.46
  4. Step 4: Simplify right side
    222.15x = 45,186.57
  5. Step 5: Solve for x
    x = 45,186.57/222.15
  6. Step 6: Final answer
    x = 203.40

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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.