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Finding the Fourth Proportional to 558.03, 836.30 and 427.55

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Solution

The fourth proportional to 558.03, 836.30 and 427.55 is: 640.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.03 : 836.30 = 427.55 : x
  2. Step 2: Convert to fraction form
    558.03/836.30 = 427.55/x
  3. Step 3: Cross multiply
    558.03x = 836.30 × 427.55
  4. Step 4: Simplify right side
    558.03x = 357,553.75
  5. Step 5: Solve for x
    x = 357,553.75/558.03
  6. Step 6: Final answer
    x = 640.74

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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.