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Finding the Fourth Proportional to 2,589.66, 3,886.31 and 1,129.23

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Solution

The fourth proportional to 2,589.66, 3,886.31 and 1,129.23 is: 1,694.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,589.66 : 3,886.31 = 1,129.23 : x
  2. Step 2: Convert to fraction form
    2,589.66/3,886.31 = 1,129.23/x
  3. Step 3: Cross multiply
    2,589.66x = 3,886.31 × 1,129.23
  4. Step 4: Simplify right side
    2,589.66x = 4,388,540.66
  5. Step 5: Solve for x
    x = 4,388,540.66/2,589.66
  6. Step 6: Final answer
    x = 1,694.64

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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.