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Finding the Fourth Proportional to 845.75, 1,166.66 and 635.85

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Solution

The fourth proportional to 845.75, 1,166.66 and 635.85 is: 877.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.75 : 1,166.66 = 635.85 : x
  2. Step 2: Convert to fraction form
    845.75/1,166.66 = 635.85/x
  3. Step 3: Cross multiply
    845.75x = 1,166.66 × 635.85
  4. Step 4: Simplify right side
    845.75x = 741,824.36
  5. Step 5: Solve for x
    x = 741,824.36/845.75
  6. Step 6: Final answer
    x = 877.12

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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.