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Finding the Fourth Proportional to 2,879.30, 3,973.27 and 1,620.40

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Solution

The fourth proportional to 2,879.30, 3,973.27 and 1,620.40 is: 2,236.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.30 : 3,973.27 = 1,620.40 : x
  2. Step 2: Convert to fraction form
    2,879.30/3,973.27 = 1,620.40/x
  3. Step 3: Cross multiply
    2,879.30x = 3,973.27 × 1,620.40
  4. Step 4: Simplify right side
    2,879.30x = 6,438,286.71
  5. Step 5: Solve for x
    x = 6,438,286.71/2,879.30
  6. Step 6: Final answer
    x = 2,236.06

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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.