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Finding the Fourth Proportional to 1,262.99, 1,743.22 and 739.33

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Solution

The fourth proportional to 1,262.99, 1,743.22 and 739.33 is: 1,020.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.99 : 1,743.22 = 739.33 : x
  2. Step 2: Convert to fraction form
    1,262.99/1,743.22 = 739.33/x
  3. Step 3: Cross multiply
    1,262.99x = 1,743.22 × 739.33
  4. Step 4: Simplify right side
    1,262.99x = 1,288,811.41
  5. Step 5: Solve for x
    x = 1,288,811.41/1,262.99
  6. Step 6: Final answer
    x = 1,020.44

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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.