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Finding the Fourth Proportional to 422.08, 582.36 and 274.72

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Solution

The fourth proportional to 422.08, 582.36 and 274.72 is: 379.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.08 : 582.36 = 274.72 : x
  2. Step 2: Convert to fraction form
    422.08/582.36 = 274.72/x
  3. Step 3: Cross multiply
    422.08x = 582.36 × 274.72
  4. Step 4: Simplify right side
    422.08x = 159,985.94
  5. Step 5: Solve for x
    x = 159,985.94/422.08
  6. Step 6: Final answer
    x = 379.04

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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.