Home / 2,589.28-3,880.14-1,288.96

Finding the Fourth Proportional to 2,589.28, 3,880.14 and 1,288.96

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Solution

The fourth proportional to 2,589.28, 3,880.14 and 1,288.96 is: 1,931.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,589.28 : 3,880.14 = 1,288.96 : x
  2. Step 2: Convert to fraction form
    2,589.28/3,880.14 = 1,288.96/x
  3. Step 3: Cross multiply
    2,589.28x = 3,880.14 × 1,288.96
  4. Step 4: Simplify right side
    2,589.28x = 5,001,345.25
  5. Step 5: Solve for x
    x = 5,001,345.25/2,589.28
  6. Step 6: Final answer
    x = 1,931.56

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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.