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Finding the Fourth Proportional to 279.06, 419.40 and 186.82

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Solution

The fourth proportional to 279.06, 419.40 and 186.82 is: 280.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.06 : 419.40 = 186.82 : x
  2. Step 2: Convert to fraction form
    279.06/419.40 = 186.82/x
  3. Step 3: Cross multiply
    279.06x = 419.40 × 186.82
  4. Step 4: Simplify right side
    279.06x = 78,351.26
  5. Step 5: Solve for x
    x = 78,351.26/279.06
  6. Step 6: Final answer
    x = 280.77

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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.