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Finding the Fourth Proportional to 3,188.80, 4,783.86 and 1,338.83

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Solution

The fourth proportional to 3,188.80, 4,783.86 and 1,338.83 is: 2,008.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,188.80 : 4,783.86 = 1,338.83 : x
  2. Step 2: Convert to fraction form
    3,188.80/4,783.86 = 1,338.83/x
  3. Step 3: Cross multiply
    3,188.80x = 4,783.86 × 1,338.83
  4. Step 4: Simplify right side
    3,188.80x = 6,404,744.67
  5. Step 5: Solve for x
    x = 6,404,744.67/3,188.80
  6. Step 6: Final answer
    x = 2,008.51

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1.5x scale

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.