Home / 2,764.40-3,815.18-2,678.28

Finding the Fourth Proportional to 2,764.40, 3,815.18 and 2,678.28

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Solution

The fourth proportional to 2,764.40, 3,815.18 and 2,678.28 is: 3,696.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,764.40 : 3,815.18 = 2,678.28 : x
  2. Step 2: Convert to fraction form
    2,764.40/3,815.18 = 2,678.28/x
  3. Step 3: Cross multiply
    2,764.40x = 3,815.18 × 2,678.28
  4. Step 4: Simplify right side
    2,764.40x = 10,218,120.29
  5. Step 5: Solve for x
    x = 10,218,120.29/2,764.40
  6. Step 6: Final answer
    x = 3,696.32

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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.