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Finding the Fourth Proportional to 483.90, 667.78 and 274.08

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Solution

The fourth proportional to 483.90, 667.78 and 274.08 is: 378.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.90 : 667.78 = 274.08 : x
  2. Step 2: Convert to fraction form
    483.90/667.78 = 274.08/x
  3. Step 3: Cross multiply
    483.90x = 667.78 × 274.08
  4. Step 4: Simplify right side
    483.90x = 183,022.49
  5. Step 5: Solve for x
    x = 183,022.49/483.90
  6. Step 6: Final answer
    x = 378.23

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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.