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Finding the Fourth Proportional to 3,872.22, 5,808.60 and 1,274.28

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Solution

The fourth proportional to 3,872.22, 5,808.60 and 1,274.28 is: 1,911.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,872.22 : 5,808.60 = 1,274.28 : x
  2. Step 2: Convert to fraction form
    3,872.22/5,808.60 = 1,274.28/x
  3. Step 3: Cross multiply
    3,872.22x = 5,808.60 × 1,274.28
  4. Step 4: Simplify right side
    3,872.22x = 7,401,782.81
  5. Step 5: Solve for x
    x = 7,401,782.81/3,872.22
  6. Step 6: Final answer
    x = 1,911.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.