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Finding the Fourth Proportional to 804.81, 1,207.23 and 394.27

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Solution

The fourth proportional to 804.81, 1,207.23 and 394.27 is: 591.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.81 : 1,207.23 = 394.27 : x
  2. Step 2: Convert to fraction form
    804.81/1,207.23 = 394.27/x
  3. Step 3: Cross multiply
    804.81x = 1,207.23 × 394.27
  4. Step 4: Simplify right side
    804.81x = 475,974.57
  5. Step 5: Solve for x
    x = 475,974.57/804.81
  6. Step 6: Final answer
    x = 591.41

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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.