Home / 3,840.28-5,299.52-2,138.77

Finding the Fourth Proportional to 3,840.28, 5,299.52 and 2,138.77

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Solution

The fourth proportional to 3,840.28, 5,299.52 and 2,138.77 is: 2,951.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,840.28 : 5,299.52 = 2,138.77 : x
  2. Step 2: Convert to fraction form
    3,840.28/5,299.52 = 2,138.77/x
  3. Step 3: Cross multiply
    3,840.28x = 5,299.52 × 2,138.77
  4. Step 4: Simplify right side
    3,840.28x = 11,334,454.39
  5. Step 5: Solve for x
    x = 11,334,454.39/3,840.28
  6. Step 6: Final answer
    x = 2,951.47

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1.5x scale

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.