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Finding the Fourth Proportional to 253.96, 380.46 and 125.80

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Solution

The fourth proportional to 253.96, 380.46 and 125.80 is: 188.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.96 : 380.46 = 125.80 : x
  2. Step 2: Convert to fraction form
    253.96/380.46 = 125.80/x
  3. Step 3: Cross multiply
    253.96x = 380.46 × 125.80
  4. Step 4: Simplify right side
    253.96x = 47,861.87
  5. Step 5: Solve for x
    x = 47,861.87/253.96
  6. Step 6: Final answer
    x = 188.46

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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.