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Finding the Fourth Proportional to 299.57, 448.28 and 217.40

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Solution

The fourth proportional to 299.57, 448.28 and 217.40 is: 325.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.57 : 448.28 = 217.40 : x
  2. Step 2: Convert to fraction form
    299.57/448.28 = 217.40/x
  3. Step 3: Cross multiply
    299.57x = 448.28 × 217.40
  4. Step 4: Simplify right side
    299.57x = 97,453.56
  5. Step 5: Solve for x
    x = 97,453.56/299.57
  6. Step 6: Final answer
    x = 325.32

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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.