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Finding the Fourth Proportional to 619.49, 854.90 and 339.73

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Solution

The fourth proportional to 619.49, 854.90 and 339.73 is: 468.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.49 : 854.90 = 339.73 : x
  2. Step 2: Convert to fraction form
    619.49/854.90 = 339.73/x
  3. Step 3: Cross multiply
    619.49x = 854.90 × 339.73
  4. Step 4: Simplify right side
    619.49x = 290,435.18
  5. Step 5: Solve for x
    x = 290,435.18/619.49
  6. Step 6: Final answer
    x = 468.83

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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.