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Finding the Fourth Proportional to 2,813.07, 3,913.05 and 2,759.61

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Solution

The fourth proportional to 2,813.07, 3,913.05 and 2,759.61 is: 3,838.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.07 : 3,913.05 = 2,759.61 : x
  2. Step 2: Convert to fraction form
    2,813.07/3,913.05 = 2,759.61/x
  3. Step 3: Cross multiply
    2,813.07x = 3,913.05 × 2,759.61
  4. Step 4: Simplify right side
    2,813.07x = 10,798,491.91
  5. Step 5: Solve for x
    x = 10,798,491.91/2,813.07
  6. Step 6: Final answer
    x = 3,838.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.