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Finding the Fourth Proportional to 1,915.92, 2,874.42 and 1,396.44

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Solution

The fourth proportional to 1,915.92, 2,874.42 and 1,396.44 is: 2,095.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.92 : 2,874.42 = 1,396.44 : x
  2. Step 2: Convert to fraction form
    1,915.92/2,874.42 = 1,396.44/x
  3. Step 3: Cross multiply
    1,915.92x = 2,874.42 × 1,396.44
  4. Step 4: Simplify right side
    1,915.92x = 4,013,955.06
  5. Step 5: Solve for x
    x = 4,013,955.06/1,915.92
  6. Step 6: Final answer
    x = 2,095.05

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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.