Home / 3,653.39-5,478.26-1,187.90

Finding the Fourth Proportional to 3,653.39, 5,478.26 and 1,187.90

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Solution

The fourth proportional to 3,653.39, 5,478.26 and 1,187.90 is: 1,781.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,653.39 : 5,478.26 = 1,187.90 : x
  2. Step 2: Convert to fraction form
    3,653.39/5,478.26 = 1,187.90/x
  3. Step 3: Cross multiply
    3,653.39x = 5,478.26 × 1,187.90
  4. Step 4: Simplify right side
    3,653.39x = 6,507,625.05
  5. Step 5: Solve for x
    x = 6,507,625.05/3,653.39
  6. Step 6: Final answer
    x = 1,781.26

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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.