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Finding the Fourth Proportional to 3,136.80, 4,699.80 and 2,650.80

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Solution

The fourth proportional to 3,136.80, 4,699.80 and 2,650.80 is: 3,971.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,136.80 : 4,699.80 = 2,650.80 : x
  2. Step 2: Convert to fraction form
    3,136.80/4,699.80 = 2,650.80/x
  3. Step 3: Cross multiply
    3,136.80x = 4,699.80 × 2,650.80
  4. Step 4: Simplify right side
    3,136.80x = 12,458,229.84
  5. Step 5: Solve for x
    x = 12,458,229.84/3,136.80
  6. Step 6: Final answer
    x = 3,971.64

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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.