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Finding the Fourth Proportional to 3,869, 5,339.15 and 2,190.73

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Solution

The fourth proportional to 3,869, 5,339.15 and 2,190.73 is: 3,023.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869 : 5,339.15 = 2,190.73 : x
  2. Step 2: Convert to fraction form
    3,869/5,339.15 = 2,190.73/x
  3. Step 3: Cross multiply
    3,869x = 5,339.15 × 2,190.73
  4. Step 4: Simplify right side
    3,869x = 11,696,598.43
  5. Step 5: Solve for x
    x = 11,696,598.43/3,869
  6. Step 6: Final answer
    x = 3,023.16

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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.