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Finding the Fourth Proportional to 806.44, 1,109.75 and 779.71

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Solution

The fourth proportional to 806.44, 1,109.75 and 779.71 is: 1,072.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.44 : 1,109.75 = 779.71 : x
  2. Step 2: Convert to fraction form
    806.44/1,109.75 = 779.71/x
  3. Step 3: Cross multiply
    806.44x = 1,109.75 × 779.71
  4. Step 4: Simplify right side
    806.44x = 865,276.50
  5. Step 5: Solve for x
    x = 865,276.50/806.44
  6. Step 6: Final answer
    x = 1,072.96

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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.