Home / 2,115.70-2,919.67-1,276.22

Finding the Fourth Proportional to 2,115.70, 2,919.67 and 1,276.22

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Solution

The fourth proportional to 2,115.70, 2,919.67 and 1,276.22 is: 1,761.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.70 : 2,919.67 = 1,276.22 : x
  2. Step 2: Convert to fraction form
    2,115.70/2,919.67 = 1,276.22/x
  3. Step 3: Cross multiply
    2,115.70x = 2,919.67 × 1,276.22
  4. Step 4: Simplify right side
    2,115.70x = 3,726,145.36
  5. Step 5: Solve for x
    x = 3,726,145.36/2,115.70
  6. Step 6: Final answer
    x = 1,761.19

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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.