Home / 1,920.34-2,650.32-1,081.21

Finding the Fourth Proportional to 1,920.34, 2,650.32 and 1,081.21

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Solution

The fourth proportional to 1,920.34, 2,650.32 and 1,081.21 is: 1,492.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.34 : 2,650.32 = 1,081.21 : x
  2. Step 2: Convert to fraction form
    1,920.34/2,650.32 = 1,081.21/x
  3. Step 3: Cross multiply
    1,920.34x = 2,650.32 × 1,081.21
  4. Step 4: Simplify right side
    1,920.34x = 2,865,539.24
  5. Step 5: Solve for x
    x = 2,865,539.24/1,920.34
  6. Step 6: Final answer
    x = 1,492.21

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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.