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Finding the Fourth Proportional to 5,745.12, 8,619 and 1,641.12

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Solution

The fourth proportional to 5,745.12, 8,619 and 1,641.12 is: 2,462.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,745.12 : 8,619 = 1,641.12 : x
  2. Step 2: Convert to fraction form
    5,745.12/8,619 = 1,641.12/x
  3. Step 3: Cross multiply
    5,745.12x = 8,619 × 1,641.12
  4. Step 4: Simplify right side
    5,745.12x = 14,144,813.28
  5. Step 5: Solve for x
    x = 14,144,813.28/5,745.12
  6. Step 6: Final answer
    x = 2,462.06

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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.