Home / 2,515.78-3,771.99-1,127.21

Finding the Fourth Proportional to 2,515.78, 3,771.99 and 1,127.21

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Solution

The fourth proportional to 2,515.78, 3,771.99 and 1,127.21 is: 1,690.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,515.78 : 3,771.99 = 1,127.21 : x
  2. Step 2: Convert to fraction form
    2,515.78/3,771.99 = 1,127.21/x
  3. Step 3: Cross multiply
    2,515.78x = 3,771.99 × 1,127.21
  4. Step 4: Simplify right side
    2,515.78x = 4,251,824.85
  5. Step 5: Solve for x
    x = 4,251,824.85/2,515.78
  6. Step 6: Final answer
    x = 1,690.07

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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.