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Finding the Fourth Proportional to 619.03, 853.50 and 385.75

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Solution

The fourth proportional to 619.03, 853.50 and 385.75 is: 531.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.03 : 853.50 = 385.75 : x
  2. Step 2: Convert to fraction form
    619.03/853.50 = 385.75/x
  3. Step 3: Cross multiply
    619.03x = 853.50 × 385.75
  4. Step 4: Simplify right side
    619.03x = 329,237.63
  5. Step 5: Solve for x
    x = 329,237.63/619.03
  6. Step 6: Final answer
    x = 531.86

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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.