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Finding the Fourth Proportional to 494.46, 740.61 and 321.39

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Solution

The fourth proportional to 494.46, 740.61 and 321.39 is: 481.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.46 : 740.61 = 321.39 : x
  2. Step 2: Convert to fraction form
    494.46/740.61 = 321.39/x
  3. Step 3: Cross multiply
    494.46x = 740.61 × 321.39
  4. Step 4: Simplify right side
    494.46x = 238,024.65
  5. Step 5: Solve for x
    x = 238,024.65/494.46
  6. Step 6: Final answer
    x = 481.38

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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.