Home / 1,920.74-2,650.37-1,081.34

Finding the Fourth Proportional to 1,920.74, 2,650.37 and 1,081.34

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Solution

The fourth proportional to 1,920.74, 2,650.37 and 1,081.34 is: 1,492.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.74 : 2,650.37 = 1,081.34 : x
  2. Step 2: Convert to fraction form
    1,920.74/2,650.37 = 1,081.34/x
  3. Step 3: Cross multiply
    1,920.74x = 2,650.37 × 1,081.34
  4. Step 4: Simplify right side
    1,920.74x = 2,865,932.44
  5. Step 5: Solve for x
    x = 2,865,932.44/1,920.74
  6. Step 6: Final answer
    x = 1,492.10

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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.