Home / 2,115.64-2,919.66-1,276.60

Finding the Fourth Proportional to 2,115.64, 2,919.66 and 1,276.60

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Solution

The fourth proportional to 2,115.64, 2,919.66 and 1,276.60 is: 1,761.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.64 : 2,919.66 = 1,276.60 : x
  2. Step 2: Convert to fraction form
    2,115.64/2,919.66 = 1,276.60/x
  3. Step 3: Cross multiply
    2,115.64x = 2,919.66 × 1,276.60
  4. Step 4: Simplify right side
    2,115.64x = 3,727,237.96
  5. Step 5: Solve for x
    x = 3,727,237.96/2,115.64
  6. Step 6: Final answer
    x = 1,761.75

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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.