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Finding the Fourth Proportional to 494.91, 743.49 and 312.44

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Solution

The fourth proportional to 494.91, 743.49 and 312.44 is: 469.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.91 : 743.49 = 312.44 : x
  2. Step 2: Convert to fraction form
    494.91/743.49 = 312.44/x
  3. Step 3: Cross multiply
    494.91x = 743.49 × 312.44
  4. Step 4: Simplify right side
    494.91x = 232,292.30
  5. Step 5: Solve for x
    x = 232,292.30/494.91
  6. Step 6: Final answer
    x = 469.36

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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.