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Finding the Fourth Proportional to 3,381.60, 5,072.80 and 1,190.88

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Solution

The fourth proportional to 3,381.60, 5,072.80 and 1,190.88 is: 1,786.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,381.60 : 5,072.80 = 1,190.88 : x
  2. Step 2: Convert to fraction form
    3,381.60/5,072.80 = 1,190.88/x
  3. Step 3: Cross multiply
    3,381.60x = 5,072.80 × 1,190.88
  4. Step 4: Simplify right side
    3,381.60x = 6,041,096.06
  5. Step 5: Solve for x
    x = 6,041,096.06/3,381.60
  6. Step 6: Final answer
    x = 1,786.46

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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.