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Finding the Fourth Proportional to 303.81, 455.72 and 141.41

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Solution

The fourth proportional to 303.81, 455.72 and 141.41 is: 212.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.81 : 455.72 = 141.41 : x
  2. Step 2: Convert to fraction form
    303.81/455.72 = 141.41/x
  3. Step 3: Cross multiply
    303.81x = 455.72 × 141.41
  4. Step 4: Simplify right side
    303.81x = 64,440.38
  5. Step 5: Solve for x
    x = 64,440.38/303.81
  6. Step 6: Final answer
    x = 212.11

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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.