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Finding the Fourth Proportional to 2,136.87, 3,205.39 and 655.98

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Solution

The fourth proportional to 2,136.87, 3,205.39 and 655.98 is: 984.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,136.87 : 3,205.39 = 655.98 : x
  2. Step 2: Convert to fraction form
    2,136.87/3,205.39 = 655.98/x
  3. Step 3: Cross multiply
    2,136.87x = 3,205.39 × 655.98
  4. Step 4: Simplify right side
    2,136.87x = 2,102,671.73
  5. Step 5: Solve for x
    x = 2,102,671.73/2,136.87
  6. Step 6: Final answer
    x = 984.00

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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.