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Finding the Fourth Proportional to 223.86, 336.05 and 121.40

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Solution

The fourth proportional to 223.86, 336.05 and 121.40 is: 182.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.86 : 336.05 = 121.40 : x
  2. Step 2: Convert to fraction form
    223.86/336.05 = 121.40/x
  3. Step 3: Cross multiply
    223.86x = 336.05 × 121.40
  4. Step 4: Simplify right side
    223.86x = 40,795.90
  5. Step 5: Solve for x
    x = 40,795.90/223.86
  6. Step 6: Final answer
    x = 182.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.