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Finding the Fourth Proportional to 253.82, 380.12 and 156.36

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Solution

The fourth proportional to 253.82, 380.12 and 156.36 is: 234.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.82 : 380.12 = 156.36 : x
  2. Step 2: Convert to fraction form
    253.82/380.12 = 156.36/x
  3. Step 3: Cross multiply
    253.82x = 380.12 × 156.36
  4. Step 4: Simplify right side
    253.82x = 59,435.56
  5. Step 5: Solve for x
    x = 59,435.56/253.82
  6. Step 6: Final answer
    x = 234.16

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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.