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Finding the Fourth Proportional to 2,579.85, 3,868.56 and 935.96

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Solution

The fourth proportional to 2,579.85, 3,868.56 and 935.96 is: 1,403.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579.85 : 3,868.56 = 935.96 : x
  2. Step 2: Convert to fraction form
    2,579.85/3,868.56 = 935.96/x
  3. Step 3: Cross multiply
    2,579.85x = 3,868.56 × 935.96
  4. Step 4: Simplify right side
    2,579.85x = 3,620,798.07
  5. Step 5: Solve for x
    x = 3,620,798.07/2,579.85
  6. Step 6: Final answer
    x = 1,403.49

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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.