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Finding the Fourth Proportional to 452.37, 678.76 and 445.09

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Solution

The fourth proportional to 452.37, 678.76 and 445.09 is: 667.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.37 : 678.76 = 445.09 : x
  2. Step 2: Convert to fraction form
    452.37/678.76 = 445.09/x
  3. Step 3: Cross multiply
    452.37x = 678.76 × 445.09
  4. Step 4: Simplify right side
    452.37x = 302,109.29
  5. Step 5: Solve for x
    x = 302,109.29/452.37
  6. Step 6: Final answer
    x = 667.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.