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Finding the Fourth Proportional to 722.21, 1,083.47 and 235.61

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Solution

The fourth proportional to 722.21, 1,083.47 and 235.61 is: 353.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.21 : 1,083.47 = 235.61 : x
  2. Step 2: Convert to fraction form
    722.21/1,083.47 = 235.61/x
  3. Step 3: Cross multiply
    722.21x = 1,083.47 × 235.61
  4. Step 4: Simplify right side
    722.21x = 255,269.77
  5. Step 5: Solve for x
    x = 255,269.77/722.21
  6. Step 6: Final answer
    x = 353.46

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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.