Home / 2,787.52-4,181.28-938.38

Finding the Fourth Proportional to 2,787.52, 4,181.28 and 938.38

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Solution

The fourth proportional to 2,787.52, 4,181.28 and 938.38 is: 1,407.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787.52 : 4,181.28 = 938.38 : x
  2. Step 2: Convert to fraction form
    2,787.52/4,181.28 = 938.38/x
  3. Step 3: Cross multiply
    2,787.52x = 4,181.28 × 938.38
  4. Step 4: Simplify right side
    2,787.52x = 3,923,629.53
  5. Step 5: Solve for x
    x = 3,923,629.53/2,787.52
  6. Step 6: Final answer
    x = 1,407.57

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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.