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Finding the Fourth Proportional to 3,859.80, 5,788.50 and 1,394.28

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Solution

The fourth proportional to 3,859.80, 5,788.50 and 1,394.28 is: 2,090.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.80 : 5,788.50 = 1,394.28 : x
  2. Step 2: Convert to fraction form
    3,859.80/5,788.50 = 1,394.28/x
  3. Step 3: Cross multiply
    3,859.80x = 5,788.50 × 1,394.28
  4. Step 4: Simplify right side
    3,859.80x = 8,070,789.78
  5. Step 5: Solve for x
    x = 8,070,789.78/3,859.80
  6. Step 6: Final answer
    x = 2,090.99

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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.