Home / 2,961.20-4,085.72-1,912

Finding the Fourth Proportional to 2,961.20, 4,085.72 and 1,912

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Solution

The fourth proportional to 2,961.20, 4,085.72 and 1,912 is: 2,638.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,961.20 : 4,085.72 = 1,912 : x
  2. Step 2: Convert to fraction form
    2,961.20/4,085.72 = 1,912/x
  3. Step 3: Cross multiply
    2,961.20x = 4,085.72 × 1,912
  4. Step 4: Simplify right side
    2,961.20x = 7,811,896.64
  5. Step 5: Solve for x
    x = 7,811,896.64/2,961.20
  6. Step 6: Final answer
    x = 2,638.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.