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Finding the Fourth Proportional to 253.75, 380.67 and 125.50

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Solution

The fourth proportional to 253.75, 380.67 and 125.50 is: 188.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.75 : 380.67 = 125.50 : x
  2. Step 2: Convert to fraction form
    253.75/380.67 = 125.50/x
  3. Step 3: Cross multiply
    253.75x = 380.67 × 125.50
  4. Step 4: Simplify right side
    253.75x = 47,774.09
  5. Step 5: Solve for x
    x = 47,774.09/253.75
  6. Step 6: Final answer
    x = 188.27

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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.