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Finding the Fourth Proportional to 759.07, 1,139.05 and 296.83

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Solution

The fourth proportional to 759.07, 1,139.05 and 296.83 is: 445.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.07 : 1,139.05 = 296.83 : x
  2. Step 2: Convert to fraction form
    759.07/1,139.05 = 296.83/x
  3. Step 3: Cross multiply
    759.07x = 1,139.05 × 296.83
  4. Step 4: Simplify right side
    759.07x = 338,104.21
  5. Step 5: Solve for x
    x = 338,104.21/759.07
  6. Step 6: Final answer
    x = 445.42

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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.