Home / 2,611.68-3,915.32-1,787.92

Finding the Fourth Proportional to 2,611.68, 3,915.32 and 1,787.92

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Solution

The fourth proportional to 2,611.68, 3,915.32 and 1,787.92 is: 2,680.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,611.68 : 3,915.32 = 1,787.92 : x
  2. Step 2: Convert to fraction form
    2,611.68/3,915.32 = 1,787.92/x
  3. Step 3: Cross multiply
    2,611.68x = 3,915.32 × 1,787.92
  4. Step 4: Simplify right side
    2,611.68x = 7,000,278.93
  5. Step 5: Solve for x
    x = 7,000,278.93/2,611.68
  6. Step 6: Final answer
    x = 2,680.37

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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.