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Finding the Fourth Proportional to 5,718.72, 8,579.44 and 2,431.92

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Solution

The fourth proportional to 5,718.72, 8,579.44 and 2,431.92 is: 3,648.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,718.72 : 8,579.44 = 2,431.92 : x
  2. Step 2: Convert to fraction form
    5,718.72/8,579.44 = 2,431.92/x
  3. Step 3: Cross multiply
    5,718.72x = 8,579.44 × 2,431.92
  4. Step 4: Simplify right side
    5,718.72x = 20,864,511.72
  5. Step 5: Solve for x
    x = 20,864,511.72/5,718.72
  6. Step 6: Final answer
    x = 3,648.46

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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.