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Finding the Fourth Proportional to 279.45, 419.06 and 125.22

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Solution

The fourth proportional to 279.45, 419.06 and 125.22 is: 187.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.45 : 419.06 = 125.22 : x
  2. Step 2: Convert to fraction form
    279.45/419.06 = 125.22/x
  3. Step 3: Cross multiply
    279.45x = 419.06 × 125.22
  4. Step 4: Simplify right side
    279.45x = 52,474.07
  5. Step 5: Solve for x
    x = 52,474.07/279.45
  6. Step 6: Final answer
    x = 187.78

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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.