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Finding the Fourth Proportional to 558.94, 771.31 and 310.25

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Solution

The fourth proportional to 558.94, 771.31 and 310.25 is: 428.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.94 : 771.31 = 310.25 : x
  2. Step 2: Convert to fraction form
    558.94/771.31 = 310.25/x
  3. Step 3: Cross multiply
    558.94x = 771.31 × 310.25
  4. Step 4: Simplify right side
    558.94x = 239,295.16
  5. Step 5: Solve for x
    x = 239,295.16/558.94
  6. Step 6: Final answer
    x = 428.12

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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.