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Finding the Fourth Proportional to 494.48, 682.21 and 317.43

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Solution

The fourth proportional to 494.48, 682.21 and 317.43 is: 437.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.48 : 682.21 = 317.43 : x
  2. Step 2: Convert to fraction form
    494.48/682.21 = 317.43/x
  3. Step 3: Cross multiply
    494.48x = 682.21 × 317.43
  4. Step 4: Simplify right side
    494.48x = 216,554.32
  5. Step 5: Solve for x
    x = 216,554.32/494.48
  6. Step 6: Final answer
    x = 437.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.