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Finding the Fourth Proportional to 272.71, 376.70 and 220.45

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Solution

The fourth proportional to 272.71, 376.70 and 220.45 is: 304.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.71 : 376.70 = 220.45 : x
  2. Step 2: Convert to fraction form
    272.71/376.70 = 220.45/x
  3. Step 3: Cross multiply
    272.71x = 376.70 × 220.45
  4. Step 4: Simplify right side
    272.71x = 83,043.52
  5. Step 5: Solve for x
    x = 83,043.52/272.71
  6. Step 6: Final answer
    x = 304.51

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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.