Home / 1,921.16-2,650.45-1,081.67

Finding the Fourth Proportional to 1,921.16, 2,650.45 and 1,081.67

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Solution

The fourth proportional to 1,921.16, 2,650.45 and 1,081.67 is: 1,492.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.16 : 2,650.45 = 1,081.67 : x
  2. Step 2: Convert to fraction form
    1,921.16/2,650.45 = 1,081.67/x
  3. Step 3: Cross multiply
    1,921.16x = 2,650.45 × 1,081.67
  4. Step 4: Simplify right side
    1,921.16x = 2,866,912.25
  5. Step 5: Solve for x
    x = 2,866,912.25/1,921.16
  6. Step 6: Final answer
    x = 1,492.28

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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.