Home / 2,787.50-4,181.52-939.08

Finding the Fourth Proportional to 2,787.50, 4,181.52 and 939.08

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Solution

The fourth proportional to 2,787.50, 4,181.52 and 939.08 is: 1,408.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.50 : 4,181.52 = 939.08 : x
  2. Step 2: Convert to fraction form
    2,787.50/4,181.52 = 939.08/x
  3. Step 3: Cross multiply
    2,787.50x = 4,181.52 × 939.08
  4. Step 4: Simplify right side
    2,787.50x = 3,926,781.80
  5. Step 5: Solve for x
    x = 3,926,781.80/2,787.50
  6. Step 6: Final answer
    x = 1,408.71

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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.