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Finding the Fourth Proportional to 1,861.62, 2,793.87 and 1,312.62

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Solution

The fourth proportional to 1,861.62, 2,793.87 and 1,312.62 is: 1,969.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.62 : 2,793.87 = 1,312.62 : x
  2. Step 2: Convert to fraction form
    1,861.62/2,793.87 = 1,312.62/x
  3. Step 3: Cross multiply
    1,861.62x = 2,793.87 × 1,312.62
  4. Step 4: Simplify right side
    1,861.62x = 3,667,289.64
  5. Step 5: Solve for x
    x = 3,667,289.64/1,861.62
  6. Step 6: Final answer
    x = 1,969.95

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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.