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Finding the Fourth Proportional to 2,578.86, 3,868.70 and 935.37

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Solution

The fourth proportional to 2,578.86, 3,868.70 and 935.37 is: 1,403.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.86 : 3,868.70 = 935.37 : x
  2. Step 2: Convert to fraction form
    2,578.86/3,868.70 = 935.37/x
  3. Step 3: Cross multiply
    2,578.86x = 3,868.70 × 935.37
  4. Step 4: Simplify right side
    2,578.86x = 3,618,661.24
  5. Step 5: Solve for x
    x = 3,618,661.24/2,578.86
  6. Step 6: Final answer
    x = 1,403.20

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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.