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Finding the Fourth Proportional to 885.73, 1,222.41 and 619.92

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Solution

The fourth proportional to 885.73, 1,222.41 and 619.92 is: 855.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.73 : 1,222.41 = 619.92 : x
  2. Step 2: Convert to fraction form
    885.73/1,222.41 = 619.92/x
  3. Step 3: Cross multiply
    885.73x = 1,222.41 × 619.92
  4. Step 4: Simplify right side
    885.73x = 757,796.41
  5. Step 5: Solve for x
    x = 757,796.41/885.73
  6. Step 6: Final answer
    x = 855.56

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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.