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Finding the Fourth Proportional to 722.34, 1,081.62 and 397.26

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Solution

The fourth proportional to 722.34, 1,081.62 and 397.26 is: 594.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.34 : 1,081.62 = 397.26 : x
  2. Step 2: Convert to fraction form
    722.34/1,081.62 = 397.26/x
  3. Step 3: Cross multiply
    722.34x = 1,081.62 × 397.26
  4. Step 4: Simplify right side
    722.34x = 429,684.36
  5. Step 5: Solve for x
    x = 429,684.36/722.34
  6. Step 6: Final answer
    x = 594.85

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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.