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Finding the Fourth Proportional to 3,619.84, 5,390.65 and 3,578.83

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Solution

The fourth proportional to 3,619.84, 5,390.65 and 3,578.83 is: 5,329.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.84 : 5,390.65 = 3,578.83 : x
  2. Step 2: Convert to fraction form
    3,619.84/5,390.65 = 3,578.83/x
  3. Step 3: Cross multiply
    3,619.84x = 5,390.65 × 3,578.83
  4. Step 4: Simplify right side
    3,619.84x = 19,292,241.26
  5. Step 5: Solve for x
    x = 19,292,241.26/3,619.84
  6. Step 6: Final answer
    x = 5,329.58

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.