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Finding the Fourth Proportional to 2,518.19, 3,775.81 and 762.67

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Solution

The fourth proportional to 2,518.19, 3,775.81 and 762.67 is: 1,143.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,518.19 : 3,775.81 = 762.67 : x
  2. Step 2: Convert to fraction form
    2,518.19/3,775.81 = 762.67/x
  3. Step 3: Cross multiply
    2,518.19x = 3,775.81 × 762.67
  4. Step 4: Simplify right side
    2,518.19x = 2,879,697.01
  5. Step 5: Solve for x
    x = 2,879,697.01/2,518.19
  6. Step 6: Final answer
    x = 1,143.56

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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.