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Finding the Fourth Proportional to 5,457.77, 8,187.87 and 2,991.32

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Solution

The fourth proportional to 5,457.77, 8,187.87 and 2,991.32 is: 4,487.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,457.77 : 8,187.87 = 2,991.32 : x
  2. Step 2: Convert to fraction form
    5,457.77/8,187.87 = 2,991.32/x
  3. Step 3: Cross multiply
    5,457.77x = 8,187.87 × 2,991.32
  4. Step 4: Simplify right side
    5,457.77x = 24,492,524.33
  5. Step 5: Solve for x
    x = 24,492,524.33/5,457.77
  6. Step 6: Final answer
    x = 4,487.64

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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.