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Finding the Fourth Proportional to 225.89, 311.93 and 143.15

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Solution

The fourth proportional to 225.89, 311.93 and 143.15 is: 197.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.89 : 311.93 = 143.15 : x
  2. Step 2: Convert to fraction form
    225.89/311.93 = 143.15/x
  3. Step 3: Cross multiply
    225.89x = 311.93 × 143.15
  4. Step 4: Simplify right side
    225.89x = 44,651.08
  5. Step 5: Solve for x
    x = 44,651.08/225.89
  6. Step 6: Final answer
    x = 197.66

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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.