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Finding the Fourth Proportional to 3,653.80, 5,481.15 and 1,313.44

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Solution

The fourth proportional to 3,653.80, 5,481.15 and 1,313.44 is: 1,970.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,653.80 : 5,481.15 = 1,313.44 : x
  2. Step 2: Convert to fraction form
    3,653.80/5,481.15 = 1,313.44/x
  3. Step 3: Cross multiply
    3,653.80x = 5,481.15 × 1,313.44
  4. Step 4: Simplify right side
    3,653.80x = 7,199,161.66
  5. Step 5: Solve for x
    x = 7,199,161.66/3,653.80
  6. Step 6: Final answer
    x = 1,970.32

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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.