Home / 2,805.20-3,870.60-2,280.32

Finding the Fourth Proportional to 2,805.20, 3,870.60 and 2,280.32

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Solution

The fourth proportional to 2,805.20, 3,870.60 and 2,280.32 is: 3,146.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,805.20 : 3,870.60 = 2,280.32 : x
  2. Step 2: Convert to fraction form
    2,805.20/3,870.60 = 2,280.32/x
  3. Step 3: Cross multiply
    2,805.20x = 3,870.60 × 2,280.32
  4. Step 4: Simplify right side
    2,805.20x = 8,826,206.59
  5. Step 5: Solve for x
    x = 8,826,206.59/2,805.20
  6. Step 6: Final answer
    x = 3,146.37

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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.