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Finding the Fourth Proportional to 558.12, 836.90 and 192.80

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Solution

The fourth proportional to 558.12, 836.90 and 192.80 is: 289.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.12 : 836.90 = 192.80 : x
  2. Step 2: Convert to fraction form
    558.12/836.90 = 192.80/x
  3. Step 3: Cross multiply
    558.12x = 836.90 × 192.80
  4. Step 4: Simplify right side
    558.12x = 161,354.32
  5. Step 5: Solve for x
    x = 161,354.32/558.12
  6. Step 6: Final answer
    x = 289.10

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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.