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Finding the Fourth Proportional to 558.86, 771.22 and 310.17

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Solution

The fourth proportional to 558.86, 771.22 and 310.17 is: 428.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.86 : 771.22 = 310.17 : x
  2. Step 2: Convert to fraction form
    558.86/771.22 = 310.17/x
  3. Step 3: Cross multiply
    558.86x = 771.22 × 310.17
  4. Step 4: Simplify right side
    558.86x = 239,209.31
  5. Step 5: Solve for x
    x = 239,209.31/558.86
  6. Step 6: Final answer
    x = 428.03

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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.