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Finding the Fourth Proportional to 199.89, 299.43 and 145.26

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Solution

The fourth proportional to 199.89, 299.43 and 145.26 is: 217.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.89 : 299.43 = 145.26 : x
  2. Step 2: Convert to fraction form
    199.89/299.43 = 145.26/x
  3. Step 3: Cross multiply
    199.89x = 299.43 × 145.26
  4. Step 4: Simplify right side
    199.89x = 43,495.20
  5. Step 5: Solve for x
    x = 43,495.20/199.89
  6. Step 6: Final answer
    x = 217.60

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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.