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Finding the Fourth Proportional to 3,578.12, 5,364.12 and 1,388.42

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Solution

The fourth proportional to 3,578.12, 5,364.12 and 1,388.42 is: 2,081.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,578.12 : 5,364.12 = 1,388.42 : x
  2. Step 2: Convert to fraction form
    3,578.12/5,364.12 = 1,388.42/x
  3. Step 3: Cross multiply
    3,578.12x = 5,364.12 × 1,388.42
  4. Step 4: Simplify right side
    3,578.12x = 7,447,651.49
  5. Step 5: Solve for x
    x = 7,447,651.49/3,578.12
  6. Step 6: Final answer
    x = 2,081.44

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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.