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Finding the Fourth Proportional to 757.96, 1,137.42 and 325.12

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Solution

The fourth proportional to 757.96, 1,137.42 and 325.12 is: 487.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.96 : 1,137.42 = 325.12 : x
  2. Step 2: Convert to fraction form
    757.96/1,137.42 = 325.12/x
  3. Step 3: Cross multiply
    757.96x = 1,137.42 × 325.12
  4. Step 4: Simplify right side
    757.96x = 369,797.99
  5. Step 5: Solve for x
    x = 369,797.99/757.96
  6. Step 6: Final answer
    x = 487.89

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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.