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Finding the Fourth Proportional to 2,911.01, 3,991.01 and 2,858.36

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Solution

The fourth proportional to 2,911.01, 3,991.01 and 2,858.36 is: 3,918.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.01 : 3,991.01 = 2,858.36 : x
  2. Step 2: Convert to fraction form
    2,911.01/3,991.01 = 2,858.36/x
  3. Step 3: Cross multiply
    2,911.01x = 3,991.01 × 2,858.36
  4. Step 4: Simplify right side
    2,911.01x = 11,407,709.10
  5. Step 5: Solve for x
    x = 11,407,709.10/2,911.01
  6. Step 6: Final answer
    x = 3,918.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.