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Finding the Fourth Proportional to 3,318.46, 4,978.26 and 1,369.60

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Solution

The fourth proportional to 3,318.46, 4,978.26 and 1,369.60 is: 2,054.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.46 : 4,978.26 = 1,369.60 : x
  2. Step 2: Convert to fraction form
    3,318.46/4,978.26 = 1,369.60/x
  3. Step 3: Cross multiply
    3,318.46x = 4,978.26 × 1,369.60
  4. Step 4: Simplify right side
    3,318.46x = 6,818,224.90
  5. Step 5: Solve for x
    x = 6,818,224.90/3,318.46
  6. Step 6: Final answer
    x = 2,054.64

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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.