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Finding the Fourth Proportional to 2,624.40, 3,936.60 and 775.44

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Solution

The fourth proportional to 2,624.40, 3,936.60 and 775.44 is: 1,163.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,624.40 : 3,936.60 = 775.44 : x
  2. Step 2: Convert to fraction form
    2,624.40/3,936.60 = 775.44/x
  3. Step 3: Cross multiply
    2,624.40x = 3,936.60 × 775.44
  4. Step 4: Simplify right side
    2,624.40x = 3,052,597.10
  5. Step 5: Solve for x
    x = 3,052,597.10/2,624.40
  6. Step 6: Final answer
    x = 1,163.16

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Similar ratio
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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.