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Finding the Fourth Proportional to 1,761.08, 2,640.92 and 786.52

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Solution

The fourth proportional to 1,761.08, 2,640.92 and 786.52 is: 1,179.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.08 : 2,640.92 = 786.52 : x
  2. Step 2: Convert to fraction form
    1,761.08/2,640.92 = 786.52/x
  3. Step 3: Cross multiply
    1,761.08x = 2,640.92 × 786.52
  4. Step 4: Simplify right side
    1,761.08x = 2,077,136.40
  5. Step 5: Solve for x
    x = 2,077,136.40/1,761.08
  6. Step 6: Final answer
    x = 1,179.47

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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.