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Finding the Fourth Proportional to 455.58, 624.60 and 447.39

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Solution

The fourth proportional to 455.58, 624.60 and 447.39 is: 613.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.58 : 624.60 = 447.39 : x
  2. Step 2: Convert to fraction form
    455.58/624.60 = 447.39/x
  3. Step 3: Cross multiply
    455.58x = 624.60 × 447.39
  4. Step 4: Simplify right side
    455.58x = 279,439.79
  5. Step 5: Solve for x
    x = 279,439.79/455.58
  6. Step 6: Final answer
    x = 613.37

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.