Home / 2,136.28-3,205.86-749.63

Finding the Fourth Proportional to 2,136.28, 3,205.86 and 749.63

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Solution

The fourth proportional to 2,136.28, 3,205.86 and 749.63 is: 1,124.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,136.28 : 3,205.86 = 749.63 : x
  2. Step 2: Convert to fraction form
    2,136.28/3,205.86 = 749.63/x
  3. Step 3: Cross multiply
    2,136.28x = 3,205.86 × 749.63
  4. Step 4: Simplify right side
    2,136.28x = 2,403,192.80
  5. Step 5: Solve for x
    x = 2,403,192.80/2,136.28
  6. Step 6: Final answer
    x = 1,124.94

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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.