Home / 2,869.60-3,959.20-1,690.24

Finding the Fourth Proportional to 2,869.60, 3,959.20 and 1,690.24

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Solution

The fourth proportional to 2,869.60, 3,959.20 and 1,690.24 is: 2,332.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,869.60 : 3,959.20 = 1,690.24 : x
  2. Step 2: Convert to fraction form
    2,869.60/3,959.20 = 1,690.24/x
  3. Step 3: Cross multiply
    2,869.60x = 3,959.20 × 1,690.24
  4. Step 4: Simplify right side
    2,869.60x = 6,691,998.21
  5. Step 5: Solve for x
    x = 6,691,998.21/2,869.60
  6. Step 6: Final answer
    x = 2,332.03

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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.