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Finding the Fourth Proportional to 5,368.08, 8,049.12 and 2,078.40

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Solution

The fourth proportional to 5,368.08, 8,049.12 and 2,078.40 is: 3,116.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,368.08 : 8,049.12 = 2,078.40 : x
  2. Step 2: Convert to fraction form
    5,368.08/8,049.12 = 2,078.40/x
  3. Step 3: Cross multiply
    5,368.08x = 8,049.12 × 2,078.40
  4. Step 4: Simplify right side
    5,368.08x = 16,729,291.01
  5. Step 5: Solve for x
    x = 16,729,291.01/5,368.08
  6. Step 6: Final answer
    x = 3,116.44

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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.