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Finding the Fourth Proportional to 253.96, 381.06 and 109.64

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Solution

The fourth proportional to 253.96, 381.06 and 109.64 is: 164.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.96 : 381.06 = 109.64 : x
  2. Step 2: Convert to fraction form
    253.96/381.06 = 109.64/x
  3. Step 3: Cross multiply
    253.96x = 381.06 × 109.64
  4. Step 4: Simplify right side
    253.96x = 41,779.42
  5. Step 5: Solve for x
    x = 41,779.42/253.96
  6. Step 6: Final answer
    x = 164.51

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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.