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Finding the Fourth Proportional to 619.25, 928.06 and 272.67

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Solution

The fourth proportional to 619.25, 928.06 and 272.67 is: 408.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.25 : 928.06 = 272.67 : x
  2. Step 2: Convert to fraction form
    619.25/928.06 = 272.67/x
  3. Step 3: Cross multiply
    619.25x = 928.06 × 272.67
  4. Step 4: Simplify right side
    619.25x = 253,049.96
  5. Step 5: Solve for x
    x = 253,049.96/619.25
  6. Step 6: Final answer
    x = 408.64

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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.