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Finding the Fourth Proportional to 2,794.88, 3,856.20 and 1,615.88

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Solution

The fourth proportional to 2,794.88, 3,856.20 and 1,615.88 is: 2,229.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,794.88 : 3,856.20 = 1,615.88 : x
  2. Step 2: Convert to fraction form
    2,794.88/3,856.20 = 1,615.88/x
  3. Step 3: Cross multiply
    2,794.88x = 3,856.20 × 1,615.88
  4. Step 4: Simplify right side
    2,794.88x = 6,231,156.46
  5. Step 5: Solve for x
    x = 6,231,156.46/2,794.88
  6. Step 6: Final answer
    x = 2,229.49

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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.