Home / 2,158.60-2,979.45-1,274.71

Finding the Fourth Proportional to 2,158.60, 2,979.45 and 1,274.71

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Solution

The fourth proportional to 2,158.60, 2,979.45 and 1,274.71 is: 1,759.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158.60 : 2,979.45 = 1,274.71 : x
  2. Step 2: Convert to fraction form
    2,158.60/2,979.45 = 1,274.71/x
  3. Step 3: Cross multiply
    2,158.60x = 2,979.45 × 1,274.71
  4. Step 4: Simplify right side
    2,158.60x = 3,797,934.71
  5. Step 5: Solve for x
    x = 3,797,934.71/2,158.60
  6. Step 6: Final answer
    x = 1,759.44

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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.