Home / 3,815.28-5,722.80-1,218.16

Finding the Fourth Proportional to 3,815.28, 5,722.80 and 1,218.16

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Solution

The fourth proportional to 3,815.28, 5,722.80 and 1,218.16 is: 1,827.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,815.28 : 5,722.80 = 1,218.16 : x
  2. Step 2: Convert to fraction form
    3,815.28/5,722.80 = 1,218.16/x
  3. Step 3: Cross multiply
    3,815.28x = 5,722.80 × 1,218.16
  4. Step 4: Simplify right side
    3,815.28x = 6,971,286.05
  5. Step 5: Solve for x
    x = 6,971,286.05/3,815.28
  6. Step 6: Final answer
    x = 1,827.20

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.