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Finding the Fourth Proportional to 279.09, 418.65 and 73.66

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Solution

The fourth proportional to 279.09, 418.65 and 73.66 is: 110.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.09 : 418.65 = 73.66 : x
  2. Step 2: Convert to fraction form
    279.09/418.65 = 73.66/x
  3. Step 3: Cross multiply
    279.09x = 418.65 × 73.66
  4. Step 4: Simplify right side
    279.09x = 30,837.76
  5. Step 5: Solve for x
    x = 30,837.76/279.09
  6. Step 6: Final answer
    x = 110.49

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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.