Home / 2,781.19-3,840.38-2,317.87

Finding the Fourth Proportional to 2,781.19, 3,840.38 and 2,317.87

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Solution

The fourth proportional to 2,781.19, 3,840.38 and 2,317.87 is: 3,200.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.19 : 3,840.38 = 2,317.87 : x
  2. Step 2: Convert to fraction form
    2,781.19/3,840.38 = 2,317.87/x
  3. Step 3: Cross multiply
    2,781.19x = 3,840.38 × 2,317.87
  4. Step 4: Simplify right side
    2,781.19x = 8,901,501.59
  5. Step 5: Solve for x
    x = 8,901,501.59/2,781.19
  6. Step 6: Final answer
    x = 3,200.61

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1.5x scale

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.