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Finding the Fourth Proportional to 2,792.88, 3,850.06 and 2,128.58

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Solution

The fourth proportional to 2,792.88, 3,850.06 and 2,128.58 is: 2,934.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,792.88 : 3,850.06 = 2,128.58 : x
  2. Step 2: Convert to fraction form
    2,792.88/3,850.06 = 2,128.58/x
  3. Step 3: Cross multiply
    2,792.88x = 3,850.06 × 2,128.58
  4. Step 4: Simplify right side
    2,792.88x = 8,195,160.71
  5. Step 5: Solve for x
    x = 8,195,160.71/2,792.88
  6. Step 6: Final answer
    x = 2,934.30

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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.