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Finding the Fourth Proportional to 806.44, 1,208.46 and 395.11

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Solution

The fourth proportional to 806.44, 1,208.46 and 395.11 is: 592.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.44 : 1,208.46 = 395.11 : x
  2. Step 2: Convert to fraction form
    806.44/1,208.46 = 395.11/x
  3. Step 3: Cross multiply
    806.44x = 1,208.46 × 395.11
  4. Step 4: Simplify right side
    806.44x = 477,474.63
  5. Step 5: Solve for x
    x = 477,474.63/806.44
  6. Step 6: Final answer
    x = 592.08

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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.