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Finding the Fourth Proportional to 2,515.63, 3,771.97 and 760.11

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Solution

The fourth proportional to 2,515.63, 3,771.97 and 760.11 is: 1,139.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,515.63 : 3,771.97 = 760.11 : x
  2. Step 2: Convert to fraction form
    2,515.63/3,771.97 = 760.11/x
  3. Step 3: Cross multiply
    2,515.63x = 3,771.97 × 760.11
  4. Step 4: Simplify right side
    2,515.63x = 2,867,112.12
  5. Step 5: Solve for x
    x = 2,867,112.12/2,515.63
  6. Step 6: Final answer
    x = 1,139.72

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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.