Home / 2,120.49-3,181.31-887.25

Finding the Fourth Proportional to 2,120.49, 3,181.31 and 887.25

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Solution

The fourth proportional to 2,120.49, 3,181.31 and 887.25 is: 1,331.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.49 : 3,181.31 = 887.25 : x
  2. Step 2: Convert to fraction form
    2,120.49/3,181.31 = 887.25/x
  3. Step 3: Cross multiply
    2,120.49x = 3,181.31 × 887.25
  4. Step 4: Simplify right side
    2,120.49x = 2,822,612.86
  5. Step 5: Solve for x
    x = 2,822,612.86/2,120.49
  6. Step 6: Final answer
    x = 1,331.11

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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.