Home / 1,962-2,939.76-1,231.92

Finding the Fourth Proportional to 1,962, 2,939.76 and 1,231.92

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Solution

The fourth proportional to 1,962, 2,939.76 and 1,231.92 is: 1,845.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,962 : 2,939.76 = 1,231.92 : x
  2. Step 2: Convert to fraction form
    1,962/2,939.76 = 1,231.92/x
  3. Step 3: Cross multiply
    1,962x = 2,939.76 × 1,231.92
  4. Step 4: Simplify right side
    1,962x = 3,621,549.14
  5. Step 5: Solve for x
    x = 3,621,549.14/1,962
  6. Step 6: Final answer
    x = 1,845.85

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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.