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Finding the Fourth Proportional to 445.05, 614.21 and 279.27

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Solution

The fourth proportional to 445.05, 614.21 and 279.27 is: 385.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.05 : 614.21 = 279.27 : x
  2. Step 2: Convert to fraction form
    445.05/614.21 = 279.27/x
  3. Step 3: Cross multiply
    445.05x = 614.21 × 279.27
  4. Step 4: Simplify right side
    445.05x = 171,529.03
  5. Step 5: Solve for x
    x = 171,529.03/445.05
  6. Step 6: Final answer
    x = 385.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.