Home / 3,142.78-4,715.25-1,971.37

Finding the Fourth Proportional to 3,142.78, 4,715.25 and 1,971.37

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Solution

The fourth proportional to 3,142.78, 4,715.25 and 1,971.37 is: 2,957.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,142.78 : 4,715.25 = 1,971.37 : x
  2. Step 2: Convert to fraction form
    3,142.78/4,715.25 = 1,971.37/x
  3. Step 3: Cross multiply
    3,142.78x = 4,715.25 × 1,971.37
  4. Step 4: Simplify right side
    3,142.78x = 9,295,502.39
  5. Step 5: Solve for x
    x = 9,295,502.39/3,142.78
  6. Step 6: Final answer
    x = 2,957.73

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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.