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Finding the Fourth Proportional to 805.56, 1,208.22 and 669.48

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Solution

The fourth proportional to 805.56, 1,208.22 and 669.48 is: 1,004.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.56 : 1,208.22 = 669.48 : x
  2. Step 2: Convert to fraction form
    805.56/1,208.22 = 669.48/x
  3. Step 3: Cross multiply
    805.56x = 1,208.22 × 669.48
  4. Step 4: Simplify right side
    805.56x = 808,879.13
  5. Step 5: Solve for x
    x = 808,879.13/805.56
  6. Step 6: Final answer
    x = 1,004.12

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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.