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Finding the Fourth Proportional to 352.95, 487.26 and 274.09

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Solution

The fourth proportional to 352.95, 487.26 and 274.09 is: 378.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.95 : 487.26 = 274.09 : x
  2. Step 2: Convert to fraction form
    352.95/487.26 = 274.09/x
  3. Step 3: Cross multiply
    352.95x = 487.26 × 274.09
  4. Step 4: Simplify right side
    352.95x = 133,551.10
  5. Step 5: Solve for x
    x = 133,551.10/352.95
  6. Step 6: Final answer
    x = 378.39

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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.