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Finding the Fourth Proportional to 2,091.87, 3,136.93 and 775.22

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Solution

The fourth proportional to 2,091.87, 3,136.93 and 775.22 is: 1,162.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.87 : 3,136.93 = 775.22 : x
  2. Step 2: Convert to fraction form
    2,091.87/3,136.93 = 775.22/x
  3. Step 3: Cross multiply
    2,091.87x = 3,136.93 × 775.22
  4. Step 4: Simplify right side
    2,091.87x = 2,431,793.25
  5. Step 5: Solve for x
    x = 2,431,793.25/2,091.87
  6. Step 6: Final answer
    x = 1,162.50

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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.