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Finding the Fourth Proportional to 2,791.44, 4,188.04 and 1,917.68

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Solution

The fourth proportional to 2,791.44, 4,188.04 and 1,917.68 is: 2,877.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791.44 : 4,188.04 = 1,917.68 : x
  2. Step 2: Convert to fraction form
    2,791.44/4,188.04 = 1,917.68/x
  3. Step 3: Cross multiply
    2,791.44x = 4,188.04 × 1,917.68
  4. Step 4: Simplify right side
    2,791.44x = 8,031,320.55
  5. Step 5: Solve for x
    x = 8,031,320.55/2,791.44
  6. Step 6: Final answer
    x = 2,877.12

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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.