Home / 2,802.60-3,865.32-2,689.20

Finding the Fourth Proportional to 2,802.60, 3,865.32 and 2,689.20

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Solution

The fourth proportional to 2,802.60, 3,865.32 and 2,689.20 is: 3,708.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,802.60 : 3,865.32 = 2,689.20 : x
  2. Step 2: Convert to fraction form
    2,802.60/3,865.32 = 2,689.20/x
  3. Step 3: Cross multiply
    2,802.60x = 3,865.32 × 2,689.20
  4. Step 4: Simplify right side
    2,802.60x = 10,394,618.54
  5. Step 5: Solve for x
    x = 10,394,618.54/2,802.60
  6. Step 6: Final answer
    x = 3,708.92

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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.