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Finding the Fourth Proportional to 559.10, 771.45 and 326.09

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Solution

The fourth proportional to 559.10, 771.45 and 326.09 is: 449.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.10 : 771.45 = 326.09 : x
  2. Step 2: Convert to fraction form
    559.10/771.45 = 326.09/x
  3. Step 3: Cross multiply
    559.10x = 771.45 × 326.09
  4. Step 4: Simplify right side
    559.10x = 251,562.13
  5. Step 5: Solve for x
    x = 251,562.13/559.10
  6. Step 6: Final answer
    x = 449.94

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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.