Home / 2,865.05-4,295.55-1,305.80

Finding the Fourth Proportional to 2,865.05, 4,295.55 and 1,305.80

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Solution

The fourth proportional to 2,865.05, 4,295.55 and 1,305.80 is: 1,957.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,865.05 : 4,295.55 = 1,305.80 : x
  2. Step 2: Convert to fraction form
    2,865.05/4,295.55 = 1,305.80/x
  3. Step 3: Cross multiply
    2,865.05x = 4,295.55 × 1,305.80
  4. Step 4: Simplify right side
    2,865.05x = 5,609,129.19
  5. Step 5: Solve for x
    x = 5,609,129.19/2,865.05
  6. Step 6: Final answer
    x = 1,957.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.