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Finding the Fourth Proportional to 3,074.92, 4,612.38 and 1,318.79

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Solution

The fourth proportional to 3,074.92, 4,612.38 and 1,318.79 is: 1,978.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,074.92 : 4,612.38 = 1,318.79 : x
  2. Step 2: Convert to fraction form
    3,074.92/4,612.38 = 1,318.79/x
  3. Step 3: Cross multiply
    3,074.92x = 4,612.38 × 1,318.79
  4. Step 4: Simplify right side
    3,074.92x = 6,082,771.33
  5. Step 5: Solve for x
    x = 6,082,771.33/3,074.92
  6. Step 6: Final answer
    x = 1,978.19

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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.