Home / 2,116.28-2,919.76-1,276.68

Finding the Fourth Proportional to 2,116.28, 2,919.76 and 1,276.68

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Solution

The fourth proportional to 2,116.28, 2,919.76 and 1,276.68 is: 1,761.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.28 : 2,919.76 = 1,276.68 : x
  2. Step 2: Convert to fraction form
    2,116.28/2,919.76 = 1,276.68/x
  3. Step 3: Cross multiply
    2,116.28x = 2,919.76 × 1,276.68
  4. Step 4: Simplify right side
    2,116.28x = 3,727,599.20
  5. Step 5: Solve for x
    x = 3,727,599.20/2,116.28
  6. Step 6: Final answer
    x = 1,761.39

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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.