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Finding the Fourth Proportional to 1,961.78, 2,707.44 and 1,077.72

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Solution

The fourth proportional to 1,961.78, 2,707.44 and 1,077.72 is: 1,487.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.78 : 2,707.44 = 1,077.72 : x
  2. Step 2: Convert to fraction form
    1,961.78/2,707.44 = 1,077.72/x
  3. Step 3: Cross multiply
    1,961.78x = 2,707.44 × 1,077.72
  4. Step 4: Simplify right side
    1,961.78x = 2,917,862.24
  5. Step 5: Solve for x
    x = 2,917,862.24/1,961.78
  6. Step 6: Final answer
    x = 1,487.35

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