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Finding the Fourth Proportional to 4,759.79, 7,139.93 and 1,249.82

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Solution

The fourth proportional to 4,759.79, 7,139.93 and 1,249.82 is: 1,874.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,759.79 : 7,139.93 = 1,249.82 : x
  2. Step 2: Convert to fraction form
    4,759.79/7,139.93 = 1,249.82/x
  3. Step 3: Cross multiply
    4,759.79x = 7,139.93 × 1,249.82
  4. Step 4: Simplify right side
    4,759.79x = 8,923,585.36
  5. Step 5: Solve for x
    x = 8,923,585.36/4,759.79
  6. Step 6: Final answer
    x = 1,874.78

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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.