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Finding the Fourth Proportional to 243, 334.87 and 223.39

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Solution

The fourth proportional to 243, 334.87 and 223.39 is: 307.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    243 : 334.87 = 223.39 : x
  2. Step 2: Convert to fraction form
    243/334.87 = 223.39/x
  3. Step 3: Cross multiply
    243x = 334.87 × 223.39
  4. Step 4: Simplify right side
    243x = 74,806.47
  5. Step 5: Solve for x
    x = 74,806.47/243
  6. Step 6: Final answer
    x = 307.85

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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.