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Finding the Fourth Proportional to 272.56, 375.64 and 223.28

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Solution

The fourth proportional to 272.56, 375.64 and 223.28 is: 307.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.56 : 375.64 = 223.28 : x
  2. Step 2: Convert to fraction form
    272.56/375.64 = 223.28/x
  3. Step 3: Cross multiply
    272.56x = 375.64 × 223.28
  4. Step 4: Simplify right side
    272.56x = 83,872.90
  5. Step 5: Solve for x
    x = 83,872.90/272.56
  6. Step 6: Final answer
    x = 307.72

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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.