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Finding the Fourth Proportional to 289.97, 400.05 and 223.59

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Solution

The fourth proportional to 289.97, 400.05 and 223.59 is: 308.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.97 : 400.05 = 223.59 : x
  2. Step 2: Convert to fraction form
    289.97/400.05 = 223.59/x
  3. Step 3: Cross multiply
    289.97x = 400.05 × 223.59
  4. Step 4: Simplify right side
    289.97x = 89,447.18
  5. Step 5: Solve for x
    x = 89,447.18/289.97
  6. Step 6: Final answer
    x = 308.47

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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.