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Finding the Fourth Proportional to 2,208.88, 3,313.32 and 669.88

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Solution

The fourth proportional to 2,208.88, 3,313.32 and 669.88 is: 1,004.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,208.88 : 3,313.32 = 669.88 : x
  2. Step 2: Convert to fraction form
    2,208.88/3,313.32 = 669.88/x
  3. Step 3: Cross multiply
    2,208.88x = 3,313.32 × 669.88
  4. Step 4: Simplify right side
    2,208.88x = 2,219,506.89
  5. Step 5: Solve for x
    x = 2,219,506.89/2,208.88
  6. Step 6: Final answer
    x = 1,004.81

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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.