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Finding the Fourth Proportional to 559.05, 771.51 and 306.99

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Solution

The fourth proportional to 559.05, 771.51 and 306.99 is: 423.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.05 : 771.51 = 306.99 : x
  2. Step 2: Convert to fraction form
    559.05/771.51 = 306.99/x
  3. Step 3: Cross multiply
    559.05x = 771.51 × 306.99
  4. Step 4: Simplify right side
    559.05x = 236,845.85
  5. Step 5: Solve for x
    x = 236,845.85/559.05
  6. Step 6: Final answer
    x = 423.66

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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.