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Finding the Fourth Proportional to 1,789.40, 2,684.94 and 864.92

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Solution

The fourth proportional to 1,789.40, 2,684.94 and 864.92 is: 1,297.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,789.40 : 2,684.94 = 864.92 : x
  2. Step 2: Convert to fraction form
    1,789.40/2,684.94 = 864.92/x
  3. Step 3: Cross multiply
    1,789.40x = 2,684.94 × 864.92
  4. Step 4: Simplify right side
    1,789.40x = 2,322,258.30
  5. Step 5: Solve for x
    x = 2,322,258.30/1,789.40
  6. Step 6: Final answer
    x = 1,297.79

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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.