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Finding the Fourth Proportional to 441.38, 661.87 and 235.90

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Solution

The fourth proportional to 441.38, 661.87 and 235.90 is: 353.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.38 : 661.87 = 235.90 : x
  2. Step 2: Convert to fraction form
    441.38/661.87 = 235.90/x
  3. Step 3: Cross multiply
    441.38x = 661.87 × 235.90
  4. Step 4: Simplify right side
    441.38x = 156,130.64
  5. Step 5: Solve for x
    x = 156,130.64/441.38
  6. Step 6: Final answer
    x = 353.74

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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.