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Finding the Fourth Proportional to 759.73, 1,139.53 and 239.69

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Solution

The fourth proportional to 759.73, 1,139.53 and 239.69 is: 359.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.73 : 1,139.53 = 239.69 : x
  2. Step 2: Convert to fraction form
    759.73/1,139.53 = 239.69/x
  3. Step 3: Cross multiply
    759.73x = 1,139.53 × 239.69
  4. Step 4: Simplify right side
    759.73x = 273,133.95
  5. Step 5: Solve for x
    x = 273,133.95/759.73
  6. Step 6: Final answer
    x = 359.51

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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.