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Finding the Fourth Proportional to 754.55, 1,132.30 and 321.71

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Solution

The fourth proportional to 754.55, 1,132.30 and 321.71 is: 482.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.55 : 1,132.30 = 321.71 : x
  2. Step 2: Convert to fraction form
    754.55/1,132.30 = 321.71/x
  3. Step 3: Cross multiply
    754.55x = 1,132.30 × 321.71
  4. Step 4: Simplify right side
    754.55x = 364,271.22
  5. Step 5: Solve for x
    x = 364,271.22/754.55
  6. Step 6: Final answer
    x = 482.76

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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.