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Finding the Fourth Proportional to 2,836.96, 3,915.10 and 1,578.37

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Solution

The fourth proportional to 2,836.96, 3,915.10 and 1,578.37 is: 2,178.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,836.96 : 3,915.10 = 1,578.37 : x
  2. Step 2: Convert to fraction form
    2,836.96/3,915.10 = 1,578.37/x
  3. Step 3: Cross multiply
    2,836.96x = 3,915.10 × 1,578.37
  4. Step 4: Simplify right side
    2,836.96x = 6,179,476.39
  5. Step 5: Solve for x
    x = 6,179,476.39/2,836.96
  6. Step 6: Final answer
    x = 2,178.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.