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Finding the Fourth Proportional to 759.93, 1,139.26 and 394.81

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Solution

The fourth proportional to 759.93, 1,139.26 and 394.81 is: 591.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.93 : 1,139.26 = 394.81 : x
  2. Step 2: Convert to fraction form
    759.93/1,139.26 = 394.81/x
  3. Step 3: Cross multiply
    759.93x = 1,139.26 × 394.81
  4. Step 4: Simplify right side
    759.93x = 449,791.24
  5. Step 5: Solve for x
    x = 449,791.24/759.93
  6. Step 6: Final answer
    x = 591.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.