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Finding the Fourth Proportional to 3,840, 5,296.74 and 2,268.60

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Solution

The fourth proportional to 3,840, 5,296.74 and 2,268.60 is: 3,129.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,840 : 5,296.74 = 2,268.60 : x
  2. Step 2: Convert to fraction form
    3,840/5,296.74 = 2,268.60/x
  3. Step 3: Cross multiply
    3,840x = 5,296.74 × 2,268.60
  4. Step 4: Simplify right side
    3,840x = 12,016,184.36
  5. Step 5: Solve for x
    x = 12,016,184.36/3,840
  6. Step 6: Final answer
    x = 3,129.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.