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Finding the Fourth Proportional to 619.73, 855.23 and 357.75

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Solution

The fourth proportional to 619.73, 855.23 and 357.75 is: 493.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.73 : 855.23 = 357.75 : x
  2. Step 2: Convert to fraction form
    619.73/855.23 = 357.75/x
  3. Step 3: Cross multiply
    619.73x = 855.23 × 357.75
  4. Step 4: Simplify right side
    619.73x = 305,959.76
  5. Step 5: Solve for x
    x = 305,959.76/619.73
  6. Step 6: Final answer
    x = 493.70

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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.