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Finding the Fourth Proportional to 333.72, 500.40 and 141.12

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Solution

The fourth proportional to 333.72, 500.40 and 141.12 is: 211.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.72 : 500.40 = 141.12 : x
  2. Step 2: Convert to fraction form
    333.72/500.40 = 141.12/x
  3. Step 3: Cross multiply
    333.72x = 500.40 × 141.12
  4. Step 4: Simplify right side
    333.72x = 70,616.45
  5. Step 5: Solve for x
    x = 70,616.45/333.72
  6. Step 6: Final answer
    x = 211.60

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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.