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Finding the Fourth Proportional to 743.51, 1,115.26 and 223.56

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Solution

The fourth proportional to 743.51, 1,115.26 and 223.56 is: 335.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.51 : 1,115.26 = 223.56 : x
  2. Step 2: Convert to fraction form
    743.51/1,115.26 = 223.56/x
  3. Step 3: Cross multiply
    743.51x = 1,115.26 × 223.56
  4. Step 4: Simplify right side
    743.51x = 249,327.53
  5. Step 5: Solve for x
    x = 249,327.53/743.51
  6. Step 6: Final answer
    x = 335.34

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Double scale
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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.