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Finding the Fourth Proportional to 483.64, 667.79 and 318.27

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Solution

The fourth proportional to 483.64, 667.79 and 318.27 is: 439.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.64 : 667.79 = 318.27 : x
  2. Step 2: Convert to fraction form
    483.64/667.79 = 318.27/x
  3. Step 3: Cross multiply
    483.64x = 667.79 × 318.27
  4. Step 4: Simplify right side
    483.64x = 212,537.52
  5. Step 5: Solve for x
    x = 212,537.52/483.64
  6. Step 6: Final answer
    x = 439.45

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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.