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Finding the Fourth Proportional to 756.96, 1,135.38 and 243.96

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Solution

The fourth proportional to 756.96, 1,135.38 and 243.96 is: 365.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.96 : 1,135.38 = 243.96 : x
  2. Step 2: Convert to fraction form
    756.96/1,135.38 = 243.96/x
  3. Step 3: Cross multiply
    756.96x = 1,135.38 × 243.96
  4. Step 4: Simplify right side
    756.96x = 276,987.30
  5. Step 5: Solve for x
    x = 276,987.30/756.96
  6. Step 6: Final answer
    x = 365.92

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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.