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Finding the Fourth Proportional to 743.44, 1,115.20 and 223.42

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Solution

The fourth proportional to 743.44, 1,115.20 and 223.42 is: 335.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.44 : 1,115.20 = 223.42 : x
  2. Step 2: Convert to fraction form
    743.44/1,115.20 = 223.42/x
  3. Step 3: Cross multiply
    743.44x = 1,115.20 × 223.42
  4. Step 4: Simplify right side
    743.44x = 249,157.98
  5. Step 5: Solve for x
    x = 249,157.98/743.44
  6. Step 6: Final answer
    x = 335.14

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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.