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Finding the Fourth Proportional to 299.85, 449.91 and 145.93

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Solution

The fourth proportional to 299.85, 449.91 and 145.93 is: 218.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.85 : 449.91 = 145.93 : x
  2. Step 2: Convert to fraction form
    299.85/449.91 = 145.93/x
  3. Step 3: Cross multiply
    299.85x = 449.91 × 145.93
  4. Step 4: Simplify right side
    299.85x = 65,655.37
  5. Step 5: Solve for x
    x = 65,655.37/299.85
  6. Step 6: Final answer
    x = 218.96

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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.