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Finding the Fourth Proportional to 843.14, 1,163.45 and 470.09

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Solution

The fourth proportional to 843.14, 1,163.45 and 470.09 is: 648.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.14 : 1,163.45 = 470.09 : x
  2. Step 2: Convert to fraction form
    843.14/1,163.45 = 470.09/x
  3. Step 3: Cross multiply
    843.14x = 1,163.45 × 470.09
  4. Step 4: Simplify right side
    843.14x = 546,930.29
  5. Step 5: Solve for x
    x = 546,930.29/843.14
  6. Step 6: Final answer
    x = 648.68

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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.