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Finding the Fourth Proportional to 272.43, 375.90 and 154.40

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Solution

The fourth proportional to 272.43, 375.90 and 154.40 is: 213.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.43 : 375.90 = 154.40 : x
  2. Step 2: Convert to fraction form
    272.43/375.90 = 154.40/x
  3. Step 3: Cross multiply
    272.43x = 375.90 × 154.40
  4. Step 4: Simplify right side
    272.43x = 58,037.08
  5. Step 5: Solve for x
    x = 58,037.08/272.43
  6. Step 6: Final answer
    x = 213.03

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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.