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Finding the Fourth Proportional to 3,355.86, 4,631 and 1,863.78

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Solution

The fourth proportional to 3,355.86, 4,631 and 1,863.78 is: 2,571.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,355.86 : 4,631 = 1,863.78 : x
  2. Step 2: Convert to fraction form
    3,355.86/4,631 = 1,863.78/x
  3. Step 3: Cross multiply
    3,355.86x = 4,631 × 1,863.78
  4. Step 4: Simplify right side
    3,355.86x = 8,631,165.18
  5. Step 5: Solve for x
    x = 8,631,165.18/3,355.86
  6. Step 6: Final answer
    x = 2,571.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.