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Finding the Fourth Proportional to 2,790.99, 4,186.99 and 1,148.72

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Solution

The fourth proportional to 2,790.99, 4,186.99 and 1,148.72 is: 1,723.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.99 : 4,186.99 = 1,148.72 : x
  2. Step 2: Convert to fraction form
    2,790.99/4,186.99 = 1,148.72/x
  3. Step 3: Cross multiply
    2,790.99x = 4,186.99 × 1,148.72
  4. Step 4: Simplify right side
    2,790.99x = 4,809,659.65
  5. Step 5: Solve for x
    x = 4,809,659.65/2,790.99
  6. Step 6: Final answer
    x = 1,723.28

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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.