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Finding the Fourth Proportional to 2,074.12, 3,111.30 and 775.48

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Solution

The fourth proportional to 2,074.12, 3,111.30 and 775.48 is: 1,163.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,074.12 : 3,111.30 = 775.48 : x
  2. Step 2: Convert to fraction form
    2,074.12/3,111.30 = 775.48/x
  3. Step 3: Cross multiply
    2,074.12x = 3,111.30 × 775.48
  4. Step 4: Simplify right side
    2,074.12x = 2,412,750.92
  5. Step 5: Solve for x
    x = 2,412,750.92/2,074.12
  6. Step 6: Final answer
    x = 1,163.26

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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.