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Finding the Fourth Proportional to 795.85, 1,096.94 and 638.19

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Solution

The fourth proportional to 795.85, 1,096.94 and 638.19 is: 879.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    795.85 : 1,096.94 = 638.19 : x
  2. Step 2: Convert to fraction form
    795.85/1,096.94 = 638.19/x
  3. Step 3: Cross multiply
    795.85x = 1,096.94 × 638.19
  4. Step 4: Simplify right side
    795.85x = 700,057.73
  5. Step 5: Solve for x
    x = 700,057.73/795.85
  6. Step 6: Final answer
    x = 879.64

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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.