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Finding the Fourth Proportional to 3,307.96, 4,961.94 and 1,939

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Solution

The fourth proportional to 3,307.96, 4,961.94 and 1,939 is: 2,908.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,307.96 : 4,961.94 = 1,939 : x
  2. Step 2: Convert to fraction form
    3,307.96/4,961.94 = 1,939/x
  3. Step 3: Cross multiply
    3,307.96x = 4,961.94 × 1,939
  4. Step 4: Simplify right side
    3,307.96x = 9,621,201.66
  5. Step 5: Solve for x
    x = 9,621,201.66/3,307.96
  6. Step 6: Final answer
    x = 2,908.50

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1.5x scale

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.