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Finding the Fourth Proportional to 619.43, 928.93 and 208.44

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Solution

The fourth proportional to 619.43, 928.93 and 208.44 is: 312.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.43 : 928.93 = 208.44 : x
  2. Step 2: Convert to fraction form
    619.43/928.93 = 208.44/x
  3. Step 3: Cross multiply
    619.43x = 928.93 × 208.44
  4. Step 4: Simplify right side
    619.43x = 193,626.17
  5. Step 5: Solve for x
    x = 193,626.17/619.43
  6. Step 6: Final answer
    x = 312.59

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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.