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Finding the Fourth Proportional to 299.99, 449.64 and 117.20

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Solution

The fourth proportional to 299.99, 449.64 and 117.20 is: 175.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.99 : 449.64 = 117.20 : x
  2. Step 2: Convert to fraction form
    299.99/449.64 = 117.20/x
  3. Step 3: Cross multiply
    299.99x = 449.64 × 117.20
  4. Step 4: Simplify right side
    299.99x = 52,698.93
  5. Step 5: Solve for x
    x = 52,698.93/299.99
  6. Step 6: Final answer
    x = 175.67

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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.