Home / 1,961.28-2,706.64-1,077.12

Finding the Fourth Proportional to 1,961.28, 2,706.64 and 1,077.12

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Solution

The fourth proportional to 1,961.28, 2,706.64 and 1,077.12 is: 1,486.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.28 : 2,706.64 = 1,077.12 : x
  2. Step 2: Convert to fraction form
    1,961.28/2,706.64 = 1,077.12/x
  3. Step 3: Cross multiply
    1,961.28x = 2,706.64 × 1,077.12
  4. Step 4: Simplify right side
    1,961.28x = 2,915,376.08
  5. Step 5: Solve for x
    x = 2,915,376.08/1,961.28
  6. Step 6: Final answer
    x = 1,486.47

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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.