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Finding the Fourth Proportional to 494.91, 683.13 and 318.03

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Solution

The fourth proportional to 494.91, 683.13 and 318.03 is: 438.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.91 : 683.13 = 318.03 : x
  2. Step 2: Convert to fraction form
    494.91/683.13 = 318.03/x
  3. Step 3: Cross multiply
    494.91x = 683.13 × 318.03
  4. Step 4: Simplify right side
    494.91x = 217,254.46
  5. Step 5: Solve for x
    x = 217,254.46/494.91
  6. Step 6: Final answer
    x = 438.98

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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.