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Finding the Fourth Proportional to 2,136.69, 3,205.38 and 655.87

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Solution

The fourth proportional to 2,136.69, 3,205.38 and 655.87 is: 983.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,136.69 : 3,205.38 = 655.87 : x
  2. Step 2: Convert to fraction form
    2,136.69/3,205.38 = 655.87/x
  3. Step 3: Cross multiply
    2,136.69x = 3,205.38 × 655.87
  4. Step 4: Simplify right side
    2,136.69x = 2,102,312.58
  5. Step 5: Solve for x
    x = 2,102,312.58/2,136.69
  6. Step 6: Final answer
    x = 983.91

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1.5x scale

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.