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Finding the Fourth Proportional to 559.69, 772.47 and 323.79

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Solution

The fourth proportional to 559.69, 772.47 and 323.79 is: 446.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.69 : 772.47 = 323.79 : x
  2. Step 2: Convert to fraction form
    559.69/772.47 = 323.79/x
  3. Step 3: Cross multiply
    559.69x = 772.47 × 323.79
  4. Step 4: Simplify right side
    559.69x = 250,115.16
  5. Step 5: Solve for x
    x = 250,115.16/559.69
  6. Step 6: Final answer
    x = 446.88

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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.