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Finding the Fourth Proportional to 558.20, 771.27 and 538.49

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Solution

The fourth proportional to 558.20, 771.27 and 538.49 is: 744.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.20 : 771.27 = 538.49 : x
  2. Step 2: Convert to fraction form
    558.20/771.27 = 538.49/x
  3. Step 3: Cross multiply
    558.20x = 771.27 × 538.49
  4. Step 4: Simplify right side
    558.20x = 415,317.33
  5. Step 5: Solve for x
    x = 415,317.33/558.20
  6. Step 6: Final answer
    x = 744.04

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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.