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Finding the Fourth Proportional to 3,788.80, 5,672.40 and 3,356.80

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Solution

The fourth proportional to 3,788.80, 5,672.40 and 3,356.80 is: 5,025.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,788.80 : 5,672.40 = 3,356.80 : x
  2. Step 2: Convert to fraction form
    3,788.80/5,672.40 = 3,356.80/x
  3. Step 3: Cross multiply
    3,788.80x = 5,672.40 × 3,356.80
  4. Step 4: Simplify right side
    3,788.80x = 19,041,112.32
  5. Step 5: Solve for x
    x = 19,041,112.32/3,788.80
  6. Step 6: Final answer
    x = 5,025.63

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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.