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Finding the Fourth Proportional to 558.05, 836.96 and 405.27

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Solution

The fourth proportional to 558.05, 836.96 and 405.27 is: 607.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.05 : 836.96 = 405.27 : x
  2. Step 2: Convert to fraction form
    558.05/836.96 = 405.27/x
  3. Step 3: Cross multiply
    558.05x = 836.96 × 405.27
  4. Step 4: Simplify right side
    558.05x = 339,192.75
  5. Step 5: Solve for x
    x = 339,192.75/558.05
  6. Step 6: Final answer
    x = 607.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.