Home / 2,115.42-3,171.21-1,201.50

Finding the Fourth Proportional to 2,115.42, 3,171.21 and 1,201.50

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Solution

The fourth proportional to 2,115.42, 3,171.21 and 1,201.50 is: 1,801.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.42 : 3,171.21 = 1,201.50 : x
  2. Step 2: Convert to fraction form
    2,115.42/3,171.21 = 1,201.50/x
  3. Step 3: Cross multiply
    2,115.42x = 3,171.21 × 1,201.50
  4. Step 4: Simplify right side
    2,115.42x = 3,810,208.82
  5. Step 5: Solve for x
    x = 3,810,208.82/2,115.42
  6. Step 6: Final answer
    x = 1,801.16

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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.