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Finding the Fourth Proportional to 2,723.68, 4,085.38 and 775.64

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Solution

The fourth proportional to 2,723.68, 4,085.38 and 775.64 is: 1,163.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,723.68 : 4,085.38 = 775.64 : x
  2. Step 2: Convert to fraction form
    2,723.68/4,085.38 = 775.64/x
  3. Step 3: Cross multiply
    2,723.68x = 4,085.38 × 775.64
  4. Step 4: Simplify right side
    2,723.68x = 3,168,784.14
  5. Step 5: Solve for x
    x = 3,168,784.14/2,723.68
  6. Step 6: Final answer
    x = 1,163.42

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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.