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Finding the Fourth Proportional to 1,791.32, 2,686.94 and 696.44

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Solution

The fourth proportional to 1,791.32, 2,686.94 and 696.44 is: 1,044.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.32 : 2,686.94 = 696.44 : x
  2. Step 2: Convert to fraction form
    1,791.32/2,686.94 = 696.44/x
  3. Step 3: Cross multiply
    1,791.32x = 2,686.94 × 696.44
  4. Step 4: Simplify right side
    1,791.32x = 1,871,275.58
  5. Step 5: Solve for x
    x = 1,871,275.58/1,791.32
  6. Step 6: Final answer
    x = 1,044.64

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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.