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Finding the Fourth Proportional to 794.07, 1,190.37 and 428.43

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Solution

The fourth proportional to 794.07, 1,190.37 and 428.43 is: 642.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.07 : 1,190.37 = 428.43 : x
  2. Step 2: Convert to fraction form
    794.07/1,190.37 = 428.43/x
  3. Step 3: Cross multiply
    794.07x = 1,190.37 × 428.43
  4. Step 4: Simplify right side
    794.07x = 509,990.22
  5. Step 5: Solve for x
    x = 509,990.22/794.07
  6. Step 6: Final answer
    x = 642.25

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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.