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Finding the Fourth Proportional to 218.32, 300.66 and 203.68

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Solution

The fourth proportional to 218.32, 300.66 and 203.68 is: 280.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.32 : 300.66 = 203.68 : x
  2. Step 2: Convert to fraction form
    218.32/300.66 = 203.68/x
  3. Step 3: Cross multiply
    218.32x = 300.66 × 203.68
  4. Step 4: Simplify right side
    218.32x = 61,238.43
  5. Step 5: Solve for x
    x = 61,238.43/218.32
  6. Step 6: Final answer
    x = 280.50

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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.