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Finding the Fourth Proportional to 223.80, 336.06 and 142.80

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Solution

The fourth proportional to 223.80, 336.06 and 142.80 is: 214.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.80 : 336.06 = 142.80 : x
  2. Step 2: Convert to fraction form
    223.80/336.06 = 142.80/x
  3. Step 3: Cross multiply
    223.80x = 336.06 × 142.80
  4. Step 4: Simplify right side
    223.80x = 47,989.37
  5. Step 5: Solve for x
    x = 47,989.37/223.80
  6. Step 6: Final answer
    x = 214.43

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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.