Home / 2,781.49-4,173.77-1,139.19

Finding the Fourth Proportional to 2,781.49, 4,173.77 and 1,139.19

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Solution

The fourth proportional to 2,781.49, 4,173.77 and 1,139.19 is: 1,709.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.49 : 4,173.77 = 1,139.19 : x
  2. Step 2: Convert to fraction form
    2,781.49/4,173.77 = 1,139.19/x
  3. Step 3: Cross multiply
    2,781.49x = 4,173.77 × 1,139.19
  4. Step 4: Simplify right side
    2,781.49x = 4,754,699.97
  5. Step 5: Solve for x
    x = 4,754,699.97/2,781.49
  6. Step 6: Final answer
    x = 1,709.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.