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Finding the Fourth Proportional to 456.01, 629.61 and 306.86

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Solution

The fourth proportional to 456.01, 629.61 and 306.86 is: 423.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.01 : 629.61 = 306.86 : x
  2. Step 2: Convert to fraction form
    456.01/629.61 = 306.86/x
  3. Step 3: Cross multiply
    456.01x = 629.61 × 306.86
  4. Step 4: Simplify right side
    456.01x = 193,205.73
  5. Step 5: Solve for x
    x = 193,205.73/456.01
  6. Step 6: Final answer
    x = 423.68

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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.