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Finding the Fourth Proportional to 336.72, 505.22 and 141.85

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Solution

The fourth proportional to 336.72, 505.22 and 141.85 is: 212.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.72 : 505.22 = 141.85 : x
  2. Step 2: Convert to fraction form
    336.72/505.22 = 141.85/x
  3. Step 3: Cross multiply
    336.72x = 505.22 × 141.85
  4. Step 4: Simplify right side
    336.72x = 71,666.18
  5. Step 5: Solve for x
    x = 71,666.18/336.72
  6. Step 6: Final answer
    x = 212.83

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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.