Home / 1,920.35-2,650.21-1,081.13

Finding the Fourth Proportional to 1,920.35, 2,650.21 and 1,081.13

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Solution

The fourth proportional to 1,920.35, 2,650.21 and 1,081.13 is: 1,492.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.35 : 2,650.21 = 1,081.13 : x
  2. Step 2: Convert to fraction form
    1,920.35/2,650.21 = 1,081.13/x
  3. Step 3: Cross multiply
    1,920.35x = 2,650.21 × 1,081.13
  4. Step 4: Simplify right side
    1,920.35x = 2,865,205.58
  5. Step 5: Solve for x
    x = 2,865,205.58/1,920.35
  6. Step 6: Final answer
    x = 1,492.03

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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.