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Finding the Fourth Proportional to 3,578.57, 5,368.37 and 1,387.52

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Solution

The fourth proportional to 3,578.57, 5,368.37 and 1,387.52 is: 2,081.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,578.57 : 5,368.37 = 1,387.52 : x
  2. Step 2: Convert to fraction form
    3,578.57/5,368.37 = 1,387.52/x
  3. Step 3: Cross multiply
    3,578.57x = 5,368.37 × 1,387.52
  4. Step 4: Simplify right side
    3,578.57x = 7,448,734.86
  5. Step 5: Solve for x
    x = 7,448,734.86/3,578.57
  6. Step 6: Final answer
    x = 2,081.48

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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.