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Finding the Fourth Proportional to 2,908.75, 4,361.48 and 1,985.43

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Solution

The fourth proportional to 2,908.75, 4,361.48 and 1,985.43 is: 2,977.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,908.75 : 4,361.48 = 1,985.43 : x
  2. Step 2: Convert to fraction form
    2,908.75/4,361.48 = 1,985.43/x
  3. Step 3: Cross multiply
    2,908.75x = 4,361.48 × 1,985.43
  4. Step 4: Simplify right side
    2,908.75x = 8,659,398.85
  5. Step 5: Solve for x
    x = 8,659,398.85/2,908.75
  6. Step 6: Final answer
    x = 2,977.01

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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.