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Finding the Fourth Proportional to 893.44, 1,231.68 and 672.64

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Solution

The fourth proportional to 893.44, 1,231.68 and 672.64 is: 927.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.44 : 1,231.68 = 672.64 : x
  2. Step 2: Convert to fraction form
    893.44/1,231.68 = 672.64/x
  3. Step 3: Cross multiply
    893.44x = 1,231.68 × 672.64
  4. Step 4: Simplify right side
    893.44x = 828,477.24
  5. Step 5: Solve for x
    x = 828,477.24/893.44
  6. Step 6: Final answer
    x = 927.29

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Why These Related Problems?

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