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Finding the Fourth Proportional to 619.22, 928.82 and 272.48

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Solution

The fourth proportional to 619.22, 928.82 and 272.48 is: 408.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.22 : 928.82 = 272.48 : x
  2. Step 2: Convert to fraction form
    619.22/928.82 = 272.48/x
  3. Step 3: Cross multiply
    619.22x = 928.82 × 272.48
  4. Step 4: Simplify right side
    619.22x = 253,084.87
  5. Step 5: Solve for x
    x = 253,084.87/619.22
  6. Step 6: Final answer
    x = 408.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.