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Finding the Fourth Proportional to 3,963.75, 5,457.76 and 3,520.88

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Solution

The fourth proportional to 3,963.75, 5,457.76 and 3,520.88 is: 4,847.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,963.75 : 5,457.76 = 3,520.88 : x
  2. Step 2: Convert to fraction form
    3,963.75/5,457.76 = 3,520.88/x
  3. Step 3: Cross multiply
    3,963.75x = 5,457.76 × 3,520.88
  4. Step 4: Simplify right side
    3,963.75x = 19,216,102.40
  5. Step 5: Solve for x
    x = 19,216,102.40/3,963.75
  6. Step 6: Final answer
    x = 4,847.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.