Home / 1,961.55-2,704.95-1,288.35

Finding the Fourth Proportional to 1,961.55, 2,704.95 and 1,288.35

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Solution

The fourth proportional to 1,961.55, 2,704.95 and 1,288.35 is: 1,776.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.55 : 2,704.95 = 1,288.35 : x
  2. Step 2: Convert to fraction form
    1,961.55/2,704.95 = 1,288.35/x
  3. Step 3: Cross multiply
    1,961.55x = 2,704.95 × 1,288.35
  4. Step 4: Simplify right side
    1,961.55x = 3,484,922.33
  5. Step 5: Solve for x
    x = 3,484,922.33/1,961.55
  6. Step 6: Final answer
    x = 1,776.62

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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.