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Finding the Fourth Proportional to 3,908.22, 5,386.22 and 3,087.08

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Solution

The fourth proportional to 3,908.22, 5,386.22 and 3,087.08 is: 4,254.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.22 : 5,386.22 = 3,087.08 : x
  2. Step 2: Convert to fraction form
    3,908.22/5,386.22 = 3,087.08/x
  3. Step 3: Cross multiply
    3,908.22x = 5,386.22 × 3,087.08
  4. Step 4: Simplify right side
    3,908.22x = 16,627,692.04
  5. Step 5: Solve for x
    x = 16,627,692.04/3,908.22
  6. Step 6: Final answer
    x = 4,254.54

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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.