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Finding the Fourth Proportional to 415.48, 622.65 and 192.85

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Solution

The fourth proportional to 415.48, 622.65 and 192.85 is: 289.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.48 : 622.65 = 192.85 : x
  2. Step 2: Convert to fraction form
    415.48/622.65 = 192.85/x
  3. Step 3: Cross multiply
    415.48x = 622.65 × 192.85
  4. Step 4: Simplify right side
    415.48x = 120,078.05
  5. Step 5: Solve for x
    x = 120,078.05/415.48
  6. Step 6: Final answer
    x = 289.01

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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.