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Finding the Fourth Proportional to 805.32, 1,206.09 and 481.32

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Solution

The fourth proportional to 805.32, 1,206.09 and 481.32 is: 720.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.32 : 1,206.09 = 481.32 : x
  2. Step 2: Convert to fraction form
    805.32/1,206.09 = 481.32/x
  3. Step 3: Cross multiply
    805.32x = 1,206.09 × 481.32
  4. Step 4: Simplify right side
    805.32x = 580,515.24
  5. Step 5: Solve for x
    x = 580,515.24/805.32
  6. Step 6: Final answer
    x = 720.85

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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.