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Finding the Fourth Proportional to 1,144.87, 1,579.91 and 620.90

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Solution

The fourth proportional to 1,144.87, 1,579.91 and 620.90 is: 856.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.87 : 1,579.91 = 620.90 : x
  2. Step 2: Convert to fraction form
    1,144.87/1,579.91 = 620.90/x
  3. Step 3: Cross multiply
    1,144.87x = 1,579.91 × 620.90
  4. Step 4: Simplify right side
    1,144.87x = 980,958.22
  5. Step 5: Solve for x
    x = 980,958.22/1,144.87
  6. Step 6: Final answer
    x = 856.83

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.