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Finding the Fourth Proportional to 3,188.40, 4,401 and 1,862.64

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Solution

The fourth proportional to 3,188.40, 4,401 and 1,862.64 is: 2,571.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,188.40 : 4,401 = 1,862.64 : x
  2. Step 2: Convert to fraction form
    3,188.40/4,401 = 1,862.64/x
  3. Step 3: Cross multiply
    3,188.40x = 4,401 × 1,862.64
  4. Step 4: Simplify right side
    3,188.40x = 8,197,478.64
  5. Step 5: Solve for x
    x = 8,197,478.64/3,188.40
  6. Step 6: Final answer
    x = 2,571.03

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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.