Home / 2,039.90-2,815.09-1,108.42

Finding the Fourth Proportional to 2,039.90, 2,815.09 and 1,108.42

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Solution

The fourth proportional to 2,039.90, 2,815.09 and 1,108.42 is: 1,529.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,039.90 : 2,815.09 = 1,108.42 : x
  2. Step 2: Convert to fraction form
    2,039.90/2,815.09 = 1,108.42/x
  3. Step 3: Cross multiply
    2,039.90x = 2,815.09 × 1,108.42
  4. Step 4: Simplify right side
    2,039.90x = 3,120,302.06
  5. Step 5: Solve for x
    x = 3,120,302.06/2,039.90
  6. Step 6: Final answer
    x = 1,529.63

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1.5x scale

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.