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Finding the Fourth Proportional to 619, 853.98 and 395.02

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Solution

The fourth proportional to 619, 853.98 and 395.02 is: 544.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    619 : 853.98 = 395.02 : x
  2. Step 2: Convert to fraction form
    619/853.98 = 395.02/x
  3. Step 3: Cross multiply
    619x = 853.98 × 395.02
  4. Step 4: Simplify right side
    619x = 337,339.18
  5. Step 5: Solve for x
    x = 337,339.18/619
  6. Step 6: Final answer
    x = 544.97

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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.