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Finding the Fourth Proportional to 2,940.30, 4,028.54 and 2,899.29

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Solution

The fourth proportional to 2,940.30, 4,028.54 and 2,899.29 is: 3,972.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,940.30 : 4,028.54 = 2,899.29 : x
  2. Step 2: Convert to fraction form
    2,940.30/4,028.54 = 2,899.29/x
  3. Step 3: Cross multiply
    2,940.30x = 4,028.54 × 2,899.29
  4. Step 4: Simplify right side
    2,940.30x = 11,679,906.35
  5. Step 5: Solve for x
    x = 11,679,906.35/2,940.30
  6. Step 6: Final answer
    x = 3,972.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.