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Finding the Fourth Proportional to 1,840.45, 2,760.68 and 453.79

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Solution

The fourth proportional to 1,840.45, 2,760.68 and 453.79 is: 680.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,840.45 : 2,760.68 = 453.79 : x
  2. Step 2: Convert to fraction form
    1,840.45/2,760.68 = 453.79/x
  3. Step 3: Cross multiply
    1,840.45x = 2,760.68 × 453.79
  4. Step 4: Simplify right side
    1,840.45x = 1,252,768.98
  5. Step 5: Solve for x
    x = 1,252,768.98/1,840.45
  6. Step 6: Final answer
    x = 680.69

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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.