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Finding the Fourth Proportional to 789.44, 1,090.64 and 603.68

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Solution

The fourth proportional to 789.44, 1,090.64 and 603.68 is: 834.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.44 : 1,090.64 = 603.68 : x
  2. Step 2: Convert to fraction form
    789.44/1,090.64 = 603.68/x
  3. Step 3: Cross multiply
    789.44x = 1,090.64 × 603.68
  4. Step 4: Simplify right side
    789.44x = 658,397.56
  5. Step 5: Solve for x
    x = 658,397.56/789.44
  6. Step 6: Final answer
    x = 834.01

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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.