Home / 2,120.38-3,181.03-887.16

Finding the Fourth Proportional to 2,120.38, 3,181.03 and 887.16

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Solution

The fourth proportional to 2,120.38, 3,181.03 and 887.16 is: 1,330.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.38 : 3,181.03 = 887.16 : x
  2. Step 2: Convert to fraction form
    2,120.38/3,181.03 = 887.16/x
  3. Step 3: Cross multiply
    2,120.38x = 3,181.03 × 887.16
  4. Step 4: Simplify right side
    2,120.38x = 2,822,069.19
  5. Step 5: Solve for x
    x = 2,822,069.19/2,120.38
  6. Step 6: Final answer
    x = 1,330.93

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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.