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Finding the Fourth Proportional to 494.88, 683.07 and 285.15

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Solution

The fourth proportional to 494.88, 683.07 and 285.15 is: 393.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.88 : 683.07 = 285.15 : x
  2. Step 2: Convert to fraction form
    494.88/683.07 = 285.15/x
  3. Step 3: Cross multiply
    494.88x = 683.07 × 285.15
  4. Step 4: Simplify right side
    494.88x = 194,778.90
  5. Step 5: Solve for x
    x = 194,778.90/494.88
  6. Step 6: Final answer
    x = 393.59

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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.