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Finding the Fourth Proportional to 559.26, 771.76 and 310.57

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Solution

The fourth proportional to 559.26, 771.76 and 310.57 is: 428.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.26 : 771.76 = 310.57 : x
  2. Step 2: Convert to fraction form
    559.26/771.76 = 310.57/x
  3. Step 3: Cross multiply
    559.26x = 771.76 × 310.57
  4. Step 4: Simplify right side
    559.26x = 239,685.50
  5. Step 5: Solve for x
    x = 239,685.50/559.26
  6. Step 6: Final answer
    x = 428.58

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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.