Home / 3,121.25-4,678.63-1,476.54

Finding the Fourth Proportional to 3,121.25, 4,678.63 and 1,476.54

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Solution

The fourth proportional to 3,121.25, 4,678.63 and 1,476.54 is: 2,213.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.25 : 4,678.63 = 1,476.54 : x
  2. Step 2: Convert to fraction form
    3,121.25/4,678.63 = 1,476.54/x
  3. Step 3: Cross multiply
    3,121.25x = 4,678.63 × 1,476.54
  4. Step 4: Simplify right side
    3,121.25x = 6,908,180.65
  5. Step 5: Solve for x
    x = 6,908,180.65/3,121.25
  6. Step 6: Final answer
    x = 2,213.28

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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.