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Finding the Fourth Proportional to 619, 853.82 and 471.31

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Solution

The fourth proportional to 619, 853.82 and 471.31 is: 650.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    619 : 853.82 = 471.31 : x
  2. Step 2: Convert to fraction form
    619/853.82 = 471.31/x
  3. Step 3: Cross multiply
    619x = 853.82 × 471.31
  4. Step 4: Simplify right side
    619x = 402,413.90
  5. Step 5: Solve for x
    x = 402,413.90/619
  6. Step 6: Final answer
    x = 650.10

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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.