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Finding the Fourth Proportional to 2,218.56, 3,325.78 and 756.68

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Solution

The fourth proportional to 2,218.56, 3,325.78 and 756.68 is: 1,134.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.56 : 3,325.78 = 756.68 : x
  2. Step 2: Convert to fraction form
    2,218.56/3,325.78 = 756.68/x
  3. Step 3: Cross multiply
    2,218.56x = 3,325.78 × 756.68
  4. Step 4: Simplify right side
    2,218.56x = 2,516,551.21
  5. Step 5: Solve for x
    x = 2,516,551.21/2,218.56
  6. Step 6: Final answer
    x = 1,134.32

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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.