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Finding the Fourth Proportional to 445.90, 668.85 and 157.33

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Solution

The fourth proportional to 445.90, 668.85 and 157.33 is: 236.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.90 : 668.85 = 157.33 : x
  2. Step 2: Convert to fraction form
    445.90/668.85 = 157.33/x
  3. Step 3: Cross multiply
    445.90x = 668.85 × 157.33
  4. Step 4: Simplify right side
    445.90x = 105,229.38
  5. Step 5: Solve for x
    x = 105,229.38/445.90
  6. Step 6: Final answer
    x = 236.00

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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.