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Finding the Fourth Proportional to 445.78, 668.74 and 250.70

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Solution

The fourth proportional to 445.78, 668.74 and 250.70 is: 376.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.78 : 668.74 = 250.70 : x
  2. Step 2: Convert to fraction form
    445.78/668.74 = 250.70/x
  3. Step 3: Cross multiply
    445.78x = 668.74 × 250.70
  4. Step 4: Simplify right side
    445.78x = 167,649.15
  5. Step 5: Solve for x
    x = 167,649.15/445.78
  6. Step 6: Final answer
    x = 376.08

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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.