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Finding the Fourth Proportional to 937.91, 1,406.86 and 321.62

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Solution

The fourth proportional to 937.91, 1,406.86 and 321.62 is: 482.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.91 : 1,406.86 = 321.62 : x
  2. Step 2: Convert to fraction form
    937.91/1,406.86 = 321.62/x
  3. Step 3: Cross multiply
    937.91x = 1,406.86 × 321.62
  4. Step 4: Simplify right side
    937.91x = 452,474.31
  5. Step 5: Solve for x
    x = 452,474.31/937.91
  6. Step 6: Final answer
    x = 482.43

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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.