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Finding the Fourth Proportional to 1,377.32, 2,067 and 761.54

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Solution

The fourth proportional to 1,377.32, 2,067 and 761.54 is: 1,142.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.32 : 2,067 = 761.54 : x
  2. Step 2: Convert to fraction form
    1,377.32/2,067 = 761.54/x
  3. Step 3: Cross multiply
    1,377.32x = 2,067 × 761.54
  4. Step 4: Simplify right side
    1,377.32x = 1,574,103.18
  5. Step 5: Solve for x
    x = 1,574,103.18/1,377.32
  6. Step 6: Final answer
    x = 1,142.87

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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.