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Finding the Fourth Proportional to 299.32, 449.38 and 289.60

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Solution

The fourth proportional to 299.32, 449.38 and 289.60 is: 434.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.32 : 449.38 = 289.60 : x
  2. Step 2: Convert to fraction form
    299.32/449.38 = 289.60/x
  3. Step 3: Cross multiply
    299.32x = 449.38 × 289.60
  4. Step 4: Simplify right side
    299.32x = 130,140.45
  5. Step 5: Solve for x
    x = 130,140.45/299.32
  6. Step 6: Final answer
    x = 434.79

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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.