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Finding the Fourth Proportional to 1,791.32, 2,686.02 and 1,175

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Solution

The fourth proportional to 1,791.32, 2,686.02 and 1,175 is: 1,761.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.32 : 2,686.02 = 1,175 : x
  2. Step 2: Convert to fraction form
    1,791.32/2,686.02 = 1,175/x
  3. Step 3: Cross multiply
    1,791.32x = 2,686.02 × 1,175
  4. Step 4: Simplify right side
    1,791.32x = 3,156,073.50
  5. Step 5: Solve for x
    x = 3,156,073.50/1,791.32
  6. Step 6: Final answer
    x = 1,761.87

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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.