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Finding the Fourth Proportional to 559.49, 772.15 and 326.69

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Solution

The fourth proportional to 559.49, 772.15 and 326.69 is: 450.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.49 : 772.15 = 326.69 : x
  2. Step 2: Convert to fraction form
    559.49/772.15 = 326.69/x
  3. Step 3: Cross multiply
    559.49x = 772.15 × 326.69
  4. Step 4: Simplify right side
    559.49x = 252,252.05
  5. Step 5: Solve for x
    x = 252,252.05/559.49
  6. Step 6: Final answer
    x = 450.86

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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.