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Finding the Fourth Proportional to 3,957.96, 5,457.05 and 2,894.87

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Solution

The fourth proportional to 3,957.96, 5,457.05 and 2,894.87 is: 3,991.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,957.96 : 5,457.05 = 2,894.87 : x
  2. Step 2: Convert to fraction form
    3,957.96/5,457.05 = 2,894.87/x
  3. Step 3: Cross multiply
    3,957.96x = 5,457.05 × 2,894.87
  4. Step 4: Simplify right side
    3,957.96x = 15,797,408.57
  5. Step 5: Solve for x
    x = 15,797,408.57/3,957.96
  6. Step 6: Final answer
    x = 3,991.30

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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.