Home / 3,678.42-5,516.46-1,212.78

Finding the Fourth Proportional to 3,678.42, 5,516.46 and 1,212.78

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Solution

The fourth proportional to 3,678.42, 5,516.46 and 1,212.78 is: 1,818.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.42 : 5,516.46 = 1,212.78 : x
  2. Step 2: Convert to fraction form
    3,678.42/5,516.46 = 1,212.78/x
  3. Step 3: Cross multiply
    3,678.42x = 5,516.46 × 1,212.78
  4. Step 4: Simplify right side
    3,678.42x = 6,690,252.36
  5. Step 5: Solve for x
    x = 6,690,252.36/3,678.42
  6. Step 6: Final answer
    x = 1,818.78

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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.