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Finding the Fourth Proportional to 1,915.75, 2,874.14 and 683.29

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Solution

The fourth proportional to 1,915.75, 2,874.14 and 683.29 is: 1,025.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.75 : 2,874.14 = 683.29 : x
  2. Step 2: Convert to fraction form
    1,915.75/2,874.14 = 683.29/x
  3. Step 3: Cross multiply
    1,915.75x = 2,874.14 × 683.29
  4. Step 4: Simplify right side
    1,915.75x = 1,963,853.33
  5. Step 5: Solve for x
    x = 1,963,853.33/1,915.75
  6. Step 6: Final answer
    x = 1,025.11

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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.