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Finding the Fourth Proportional to 2,908.85, 4,361.62 and 1,985.52

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Solution

The fourth proportional to 2,908.85, 4,361.62 and 1,985.52 is: 2,977.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,908.85 : 4,361.62 = 1,985.52 : x
  2. Step 2: Convert to fraction form
    2,908.85/4,361.62 = 1,985.52/x
  3. Step 3: Cross multiply
    2,908.85x = 4,361.62 × 1,985.52
  4. Step 4: Simplify right side
    2,908.85x = 8,660,089.68
  5. Step 5: Solve for x
    x = 8,660,089.68/2,908.85
  6. Step 6: Final answer
    x = 2,977.15

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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.