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Finding the Fourth Proportional to 619.61, 853.33 and 573.44

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Solution

The fourth proportional to 619.61, 853.33 and 573.44 is: 789.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.61 : 853.33 = 573.44 : x
  2. Step 2: Convert to fraction form
    619.61/853.33 = 573.44/x
  3. Step 3: Cross multiply
    619.61x = 853.33 × 573.44
  4. Step 4: Simplify right side
    619.61x = 489,333.56
  5. Step 5: Solve for x
    x = 489,333.56/619.61
  6. Step 6: Final answer
    x = 789.74

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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.