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Finding the Fourth Proportional to 794.71, 1,094.20 and 721.81

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Solution

The fourth proportional to 794.71, 1,094.20 and 721.81 is: 993.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.71 : 1,094.20 = 721.81 : x
  2. Step 2: Convert to fraction form
    794.71/1,094.20 = 721.81/x
  3. Step 3: Cross multiply
    794.71x = 1,094.20 × 721.81
  4. Step 4: Simplify right side
    794.71x = 789,804.50
  5. Step 5: Solve for x
    x = 789,804.50/794.71
  6. Step 6: Final answer
    x = 993.83

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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.