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Finding the Fourth Proportional to 1,195.97, 1,649.32 and 775.87

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Solution

The fourth proportional to 1,195.97, 1,649.32 and 775.87 is: 1,069.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.97 : 1,649.32 = 775.87 : x
  2. Step 2: Convert to fraction form
    1,195.97/1,649.32 = 775.87/x
  3. Step 3: Cross multiply
    1,195.97x = 1,649.32 × 775.87
  4. Step 4: Simplify right side
    1,195.97x = 1,279,651.85
  5. Step 5: Solve for x
    x = 1,279,651.85/1,195.97
  6. Step 6: Final answer
    x = 1,069.97

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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.