Home / 2,815.15-3,884.28-1,620.28

Finding the Fourth Proportional to 2,815.15, 3,884.28 and 1,620.28

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Solution

The fourth proportional to 2,815.15, 3,884.28 and 1,620.28 is: 2,235.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.15 : 3,884.28 = 1,620.28 : x
  2. Step 2: Convert to fraction form
    2,815.15/3,884.28 = 1,620.28/x
  3. Step 3: Cross multiply
    2,815.15x = 3,884.28 × 1,620.28
  4. Step 4: Simplify right side
    2,815.15x = 6,293,621.20
  5. Step 5: Solve for x
    x = 6,293,621.20/2,815.15
  6. Step 6: Final answer
    x = 2,235.63

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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.