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Finding the Fourth Proportional to 619.26, 928.66 and 208.27

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Solution

The fourth proportional to 619.26, 928.66 and 208.27 is: 312.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.26 : 928.66 = 208.27 : x
  2. Step 2: Convert to fraction form
    619.26/928.66 = 208.27/x
  3. Step 3: Cross multiply
    619.26x = 928.66 × 208.27
  4. Step 4: Simplify right side
    619.26x = 193,412.02
  5. Step 5: Solve for x
    x = 193,412.02/619.26
  6. Step 6: Final answer
    x = 312.33

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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.