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Finding the Fourth Proportional to 456.35, 629.83 and 279.41

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Solution

The fourth proportional to 456.35, 629.83 and 279.41 is: 385.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.35 : 629.83 = 279.41 : x
  2. Step 2: Convert to fraction form
    456.35/629.83 = 279.41/x
  3. Step 3: Cross multiply
    456.35x = 629.83 × 279.41
  4. Step 4: Simplify right side
    456.35x = 175,980.80
  5. Step 5: Solve for x
    x = 175,980.80/456.35
  6. Step 6: Final answer
    x = 385.63

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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.