Home / 3,122.26-4,683.42-1,390.78

Finding the Fourth Proportional to 3,122.26, 4,683.42 and 1,390.78

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Solution

The fourth proportional to 3,122.26, 4,683.42 and 1,390.78 is: 2,086.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.26 : 4,683.42 = 1,390.78 : x
  2. Step 2: Convert to fraction form
    3,122.26/4,683.42 = 1,390.78/x
  3. Step 3: Cross multiply
    3,122.26x = 4,683.42 × 1,390.78
  4. Step 4: Simplify right side
    3,122.26x = 6,513,606.87
  5. Step 5: Solve for x
    x = 6,513,606.87/3,122.26
  6. Step 6: Final answer
    x = 2,086.18

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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.