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Finding the Fourth Proportional to 456.03, 629.44 and 308.68

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Solution

The fourth proportional to 456.03, 629.44 and 308.68 is: 426.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.03 : 629.44 = 308.68 : x
  2. Step 2: Convert to fraction form
    456.03/629.44 = 308.68/x
  3. Step 3: Cross multiply
    456.03x = 629.44 × 308.68
  4. Step 4: Simplify right side
    456.03x = 194,293.19
  5. Step 5: Solve for x
    x = 194,293.19/456.03
  6. Step 6: Final answer
    x = 426.05

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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.