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Finding the Fourth Proportional to 3,898.94, 5,372.78 and 2,776.77

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Solution

The fourth proportional to 3,898.94, 5,372.78 and 2,776.77 is: 3,826.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.94 : 5,372.78 = 2,776.77 : x
  2. Step 2: Convert to fraction form
    3,898.94/5,372.78 = 2,776.77/x
  3. Step 3: Cross multiply
    3,898.94x = 5,372.78 × 2,776.77
  4. Step 4: Simplify right side
    3,898.94x = 14,918,960.44
  5. Step 5: Solve for x
    x = 14,918,960.44/3,898.94
  6. Step 6: Final answer
    x = 3,826.42

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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.