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Finding the Fourth Proportional to 3,833.94, 5,290.68 and 2,155.62

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Solution

The fourth proportional to 3,833.94, 5,290.68 and 2,155.62 is: 2,974.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,833.94 : 5,290.68 = 2,155.62 : x
  2. Step 2: Convert to fraction form
    3,833.94/5,290.68 = 2,155.62/x
  3. Step 3: Cross multiply
    3,833.94x = 5,290.68 × 2,155.62
  4. Step 4: Simplify right side
    3,833.94x = 11,404,695.62
  5. Step 5: Solve for x
    x = 11,404,695.62/3,833.94
  6. Step 6: Final answer
    x = 2,974.67

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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.