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Finding the Fourth Proportional to 5,688.56, 8,540.78 and 2,917.15

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Solution

The fourth proportional to 5,688.56, 8,540.78 and 2,917.15 is: 4,379.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,688.56 : 8,540.78 = 2,917.15 : x
  2. Step 2: Convert to fraction form
    5,688.56/8,540.78 = 2,917.15/x
  3. Step 3: Cross multiply
    5,688.56x = 8,540.78 × 2,917.15
  4. Step 4: Simplify right side
    5,688.56x = 24,914,700.44
  5. Step 5: Solve for x
    x = 24,914,700.44/5,688.56
  6. Step 6: Final answer
    x = 4,379.79

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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.