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Finding the Fourth Proportional to 3,626.56, 5,440.62 and 1,318

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Solution

The fourth proportional to 3,626.56, 5,440.62 and 1,318 is: 1,977.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,626.56 : 5,440.62 = 1,318 : x
  2. Step 2: Convert to fraction form
    3,626.56/5,440.62 = 1,318/x
  3. Step 3: Cross multiply
    3,626.56x = 5,440.62 × 1,318
  4. Step 4: Simplify right side
    3,626.56x = 7,170,737.16
  5. Step 5: Solve for x
    x = 7,170,737.16/3,626.56
  6. Step 6: Final answer
    x = 1,977.28

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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.