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Finding the Fourth Proportional to 445.43, 614.77 and 279.54

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Solution

The fourth proportional to 445.43, 614.77 and 279.54 is: 385.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.43 : 614.77 = 279.54 : x
  2. Step 2: Convert to fraction form
    445.43/614.77 = 279.54/x
  3. Step 3: Cross multiply
    445.43x = 614.77 × 279.54
  4. Step 4: Simplify right side
    445.43x = 171,852.11
  5. Step 5: Solve for x
    x = 171,852.11/445.43
  6. Step 6: Final answer
    x = 385.81

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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.