Home / 1,920.51-2,650.41-1,081.17

Finding the Fourth Proportional to 1,920.51, 2,650.41 and 1,081.17

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Solution

The fourth proportional to 1,920.51, 2,650.41 and 1,081.17 is: 1,492.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.51 : 2,650.41 = 1,081.17 : x
  2. Step 2: Convert to fraction form
    1,920.51/2,650.41 = 1,081.17/x
  3. Step 3: Cross multiply
    1,920.51x = 2,650.41 × 1,081.17
  4. Step 4: Simplify right side
    1,920.51x = 2,865,543.78
  5. Step 5: Solve for x
    x = 2,865,543.78/1,920.51
  6. Step 6: Final answer
    x = 1,492.07

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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.