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Finding the Fourth Proportional to 272.64, 375.62 and 217.28

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Solution

The fourth proportional to 272.64, 375.62 and 217.28 is: 299.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.64 : 375.62 = 217.28 : x
  2. Step 2: Convert to fraction form
    272.64/375.62 = 217.28/x
  3. Step 3: Cross multiply
    272.64x = 375.62 × 217.28
  4. Step 4: Simplify right side
    272.64x = 81,614.71
  5. Step 5: Solve for x
    x = 81,614.71/272.64
  6. Step 6: Final answer
    x = 299.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.