Home / 1,908.70-2,863.59-1,129.39

Finding the Fourth Proportional to 1,908.70, 2,863.59 and 1,129.39

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Solution

The fourth proportional to 1,908.70, 2,863.59 and 1,129.39 is: 1,694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908.70 : 2,863.59 = 1,129.39 : x
  2. Step 2: Convert to fraction form
    1,908.70/2,863.59 = 1,129.39/x
  3. Step 3: Cross multiply
    1,908.70x = 2,863.59 × 1,129.39
  4. Step 4: Simplify right side
    1,908.70x = 3,234,109.91
  5. Step 5: Solve for x
    x = 3,234,109.91/1,908.70
  6. Step 6: Final answer
    x = 1,694.40

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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.