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Finding the Fourth Proportional to 5,745.40, 8,619.30 and 1,850.20

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Solution

The fourth proportional to 5,745.40, 8,619.30 and 1,850.20 is: 2,775.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,745.40 : 8,619.30 = 1,850.20 : x
  2. Step 2: Convert to fraction form
    5,745.40/8,619.30 = 1,850.20/x
  3. Step 3: Cross multiply
    5,745.40x = 8,619.30 × 1,850.20
  4. Step 4: Simplify right side
    5,745.40x = 15,947,428.86
  5. Step 5: Solve for x
    x = 15,947,428.86/5,745.40
  6. Step 6: Final answer
    x = 2,775.69

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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.