Home / 3,938.60-5,916.70-3,290.60

Finding the Fourth Proportional to 3,938.60, 5,916.70 and 3,290.60

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Solution

The fourth proportional to 3,938.60, 5,916.70 and 3,290.60 is: 4,943.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.60 : 5,916.70 = 3,290.60 : x
  2. Step 2: Convert to fraction form
    3,938.60/5,916.70 = 3,290.60/x
  3. Step 3: Cross multiply
    3,938.60x = 5,916.70 × 3,290.60
  4. Step 4: Simplify right side
    3,938.60x = 19,469,493.02
  5. Step 5: Solve for x
    x = 19,469,493.02/3,938.60
  6. Step 6: Final answer
    x = 4,943.25

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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.