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Finding the Fourth Proportional to 3,578.91, 5,367.45 and 1,386.44

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Solution

The fourth proportional to 3,578.91, 5,367.45 and 1,386.44 is: 2,079.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,578.91 : 5,367.45 = 1,386.44 : x
  2. Step 2: Convert to fraction form
    3,578.91/5,367.45 = 1,386.44/x
  3. Step 3: Cross multiply
    3,578.91x = 5,367.45 × 1,386.44
  4. Step 4: Simplify right side
    3,578.91x = 7,441,647.38
  5. Step 5: Solve for x
    x = 7,441,647.38/3,578.91
  6. Step 6: Final answer
    x = 2,079.31

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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.