Home / 2,855.39-4,280.21-1,372.45

Finding the Fourth Proportional to 2,855.39, 4,280.21 and 1,372.45

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Solution

The fourth proportional to 2,855.39, 4,280.21 and 1,372.45 is: 2,057.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.39 : 4,280.21 = 1,372.45 : x
  2. Step 2: Convert to fraction form
    2,855.39/4,280.21 = 1,372.45/x
  3. Step 3: Cross multiply
    2,855.39x = 4,280.21 × 1,372.45
  4. Step 4: Simplify right side
    2,855.39x = 5,874,374.21
  5. Step 5: Solve for x
    x = 5,874,374.21/2,855.39
  6. Step 6: Final answer
    x = 2,057.29

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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.