Home / 2,787.75-4,181.90-939.33

Finding the Fourth Proportional to 2,787.75, 4,181.90 and 939.33

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Solution

The fourth proportional to 2,787.75, 4,181.90 and 939.33 is: 1,409.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.75 : 4,181.90 = 939.33 : x
  2. Step 2: Convert to fraction form
    2,787.75/4,181.90 = 939.33/x
  3. Step 3: Cross multiply
    2,787.75x = 4,181.90 × 939.33
  4. Step 4: Simplify right side
    2,787.75x = 3,928,184.13
  5. Step 5: Solve for x
    x = 3,928,184.13/2,787.75
  6. Step 6: Final answer
    x = 1,409.09

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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.