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Finding the Fourth Proportional to 483.97, 667.72 and 274.12

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Solution

The fourth proportional to 483.97, 667.72 and 274.12 is: 378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.97 : 667.72 = 274.12 : x
  2. Step 2: Convert to fraction form
    483.97/667.72 = 274.12/x
  3. Step 3: Cross multiply
    483.97x = 667.72 × 274.12
  4. Step 4: Simplify right side
    483.97x = 183,035.41
  5. Step 5: Solve for x
    x = 183,035.41/483.97
  6. Step 6: Final answer
    x = 378.20

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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.