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Finding the Fourth Proportional to 445.03, 667.78 and 239.56

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Solution

The fourth proportional to 445.03, 667.78 and 239.56 is: 359.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.03 : 667.78 = 239.56 : x
  2. Step 2: Convert to fraction form
    445.03/667.78 = 239.56/x
  3. Step 3: Cross multiply
    445.03x = 667.78 × 239.56
  4. Step 4: Simplify right side
    445.03x = 159,971.11
  5. Step 5: Solve for x
    x = 159,971.11/445.03
  6. Step 6: Final answer
    x = 359.46

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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.