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Finding the Fourth Proportional to 484.20, 667.59 and 318.12

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Solution

The fourth proportional to 484.20, 667.59 and 318.12 is: 438.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.20 : 667.59 = 318.12 : x
  2. Step 2: Convert to fraction form
    484.20/667.59 = 318.12/x
  3. Step 3: Cross multiply
    484.20x = 667.59 × 318.12
  4. Step 4: Simplify right side
    484.20x = 212,373.73
  5. Step 5: Solve for x
    x = 212,373.73/484.20
  6. Step 6: Final answer
    x = 438.61

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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.