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Finding the Fourth Proportional to 423.21, 635.12 and 249.77

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Solution

The fourth proportional to 423.21, 635.12 and 249.77 is: 374.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.21 : 635.12 = 249.77 : x
  2. Step 2: Convert to fraction form
    423.21/635.12 = 249.77/x
  3. Step 3: Cross multiply
    423.21x = 635.12 × 249.77
  4. Step 4: Simplify right side
    423.21x = 158,633.92
  5. Step 5: Solve for x
    x = 158,633.92/423.21
  6. Step 6: Final answer
    x = 374.84

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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.