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Finding the Fourth Proportional to 721.93, 1,083.02 and 448.33

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Solution

The fourth proportional to 721.93, 1,083.02 and 448.33 is: 672.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.93 : 1,083.02 = 448.33 : x
  2. Step 2: Convert to fraction form
    721.93/1,083.02 = 448.33/x
  3. Step 3: Cross multiply
    721.93x = 1,083.02 × 448.33
  4. Step 4: Simplify right side
    721.93x = 485,550.36
  5. Step 5: Solve for x
    x = 485,550.36/721.93
  6. Step 6: Final answer
    x = 672.57

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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.