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Finding the Fourth Proportional to 3,242.28, 4,474.74 and 1,917.12

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Solution

The fourth proportional to 3,242.28, 4,474.74 and 1,917.12 is: 2,645.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,242.28 : 4,474.74 = 1,917.12 : x
  2. Step 2: Convert to fraction form
    3,242.28/4,474.74 = 1,917.12/x
  3. Step 3: Cross multiply
    3,242.28x = 4,474.74 × 1,917.12
  4. Step 4: Simplify right side
    3,242.28x = 8,578,613.55
  5. Step 5: Solve for x
    x = 8,578,613.55/3,242.28
  6. Step 6: Final answer
    x = 2,645.86

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