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Finding the Fourth Proportional to 794.31, 1,190.77 and 307.69

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Solution

The fourth proportional to 794.31, 1,190.77 and 307.69 is: 461.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.31 : 1,190.77 = 307.69 : x
  2. Step 2: Convert to fraction form
    794.31/1,190.77 = 307.69/x
  3. Step 3: Cross multiply
    794.31x = 1,190.77 × 307.69
  4. Step 4: Simplify right side
    794.31x = 366,388.02
  5. Step 5: Solve for x
    x = 366,388.02/794.31
  6. Step 6: Final answer
    x = 461.27

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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.