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Finding the Fourth Proportional to 2,773.92, 4,161.44 and 1,388.16

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Solution

The fourth proportional to 2,773.92, 4,161.44 and 1,388.16 is: 2,082.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,773.92 : 4,161.44 = 1,388.16 : x
  2. Step 2: Convert to fraction form
    2,773.92/4,161.44 = 1,388.16/x
  3. Step 3: Cross multiply
    2,773.92x = 4,161.44 × 1,388.16
  4. Step 4: Simplify right side
    2,773.92x = 5,776,744.55
  5. Step 5: Solve for x
    x = 5,776,744.55/2,773.92
  6. Step 6: Final answer
    x = 2,082.52

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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.