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Finding the Fourth Proportional to 3,808.92, 5,259.42 and 2,815.32

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Solution

The fourth proportional to 3,808.92, 5,259.42 and 2,815.32 is: 3,887.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,808.92 : 5,259.42 = 2,815.32 : x
  2. Step 2: Convert to fraction form
    3,808.92/5,259.42 = 2,815.32/x
  3. Step 3: Cross multiply
    3,808.92x = 5,259.42 × 2,815.32
  4. Step 4: Simplify right side
    3,808.92x = 14,806,950.31
  5. Step 5: Solve for x
    x = 14,806,950.31/3,808.92
  6. Step 6: Final answer
    x = 3,887.44

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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.