Home / 2,781.92-3,837.56-1,720.28

Finding the Fourth Proportional to 2,781.92, 3,837.56 and 1,720.28

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Solution

The fourth proportional to 2,781.92, 3,837.56 and 1,720.28 is: 2,373.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.92 : 3,837.56 = 1,720.28 : x
  2. Step 2: Convert to fraction form
    2,781.92/3,837.56 = 1,720.28/x
  3. Step 3: Cross multiply
    2,781.92x = 3,837.56 × 1,720.28
  4. Step 4: Simplify right side
    2,781.92x = 6,601,677.72
  5. Step 5: Solve for x
    x = 6,601,677.72/2,781.92
  6. Step 6: Final answer
    x = 2,373.07

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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.