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Finding the Fourth Proportional to 1,899.59, 2,850.86 and 1,318.67

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Solution

The fourth proportional to 1,899.59, 2,850.86 and 1,318.67 is: 1,979.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,899.59 : 2,850.86 = 1,318.67 : x
  2. Step 2: Convert to fraction form
    1,899.59/2,850.86 = 1,318.67/x
  3. Step 3: Cross multiply
    1,899.59x = 2,850.86 × 1,318.67
  4. Step 4: Simplify right side
    1,899.59x = 3,759,343.56
  5. Step 5: Solve for x
    x = 3,759,343.56/1,899.59
  6. Step 6: Final answer
    x = 1,979.03

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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.