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Finding the Fourth Proportional to 1,768.99, 2,653.94 and 672.76

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Solution

The fourth proportional to 1,768.99, 2,653.94 and 672.76 is: 1,009.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768.99 : 2,653.94 = 672.76 : x
  2. Step 2: Convert to fraction form
    1,768.99/2,653.94 = 672.76/x
  3. Step 3: Cross multiply
    1,768.99x = 2,653.94 × 672.76
  4. Step 4: Simplify right side
    1,768.99x = 1,785,452.85
  5. Step 5: Solve for x
    x = 1,785,452.85/1,768.99
  6. Step 6: Final answer
    x = 1,009.31

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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.