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Finding the Fourth Proportional to 679.73, 936.83 and 561.00

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Solution

The fourth proportional to 679.73, 936.83 and 561.00 is: 773.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.73 : 936.83 = 561.00 : x
  2. Step 2: Convert to fraction form
    679.73/936.83 = 561.00/x
  3. Step 3: Cross multiply
    679.73x = 936.83 × 561.00
  4. Step 4: Simplify right side
    679.73x = 525,558.12
  5. Step 5: Solve for x
    x = 525,558.12/679.73
  6. Step 6: Final answer
    x = 773.19

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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.