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Finding the Fourth Proportional to 757.12, 1,134.48 and 323.68

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Solution

The fourth proportional to 757.12, 1,134.48 and 323.68 is: 485.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.12 : 1,134.48 = 323.68 : x
  2. Step 2: Convert to fraction form
    757.12/1,134.48 = 323.68/x
  3. Step 3: Cross multiply
    757.12x = 1,134.48 × 323.68
  4. Step 4: Simplify right side
    757.12x = 367,208.49
  5. Step 5: Solve for x
    x = 367,208.49/757.12
  6. Step 6: Final answer
    x = 485.01

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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.