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Finding the Fourth Proportional to 3,859.44, 5,785.62 and 1,393.68

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Solution

The fourth proportional to 3,859.44, 5,785.62 and 1,393.68 is: 2,089.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.44 : 5,785.62 = 1,393.68 : x
  2. Step 2: Convert to fraction form
    3,859.44/5,785.62 = 1,393.68/x
  3. Step 3: Cross multiply
    3,859.44x = 5,785.62 × 1,393.68
  4. Step 4: Simplify right side
    3,859.44x = 8,063,302.88
  5. Step 5: Solve for x
    x = 8,063,302.88/3,859.44
  6. Step 6: Final answer
    x = 2,089.24

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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.