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Finding the Fourth Proportional to 2,380.91, 3,570.67 and 919.72

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Solution

The fourth proportional to 2,380.91, 3,570.67 and 919.72 is: 1,379.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,380.91 : 3,570.67 = 919.72 : x
  2. Step 2: Convert to fraction form
    2,380.91/3,570.67 = 919.72/x
  3. Step 3: Cross multiply
    2,380.91x = 3,570.67 × 919.72
  4. Step 4: Simplify right side
    2,380.91x = 3,284,016.61
  5. Step 5: Solve for x
    x = 3,284,016.61/2,380.91
  6. Step 6: Final answer
    x = 1,379.31

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.