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Finding the Fourth Proportional to 272.12, 375.09 and 189.10

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Solution

The fourth proportional to 272.12, 375.09 and 189.10 is: 260.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.12 : 375.09 = 189.10 : x
  2. Step 2: Convert to fraction form
    272.12/375.09 = 189.10/x
  3. Step 3: Cross multiply
    272.12x = 375.09 × 189.10
  4. Step 4: Simplify right side
    272.12x = 70,929.52
  5. Step 5: Solve for x
    x = 70,929.52/272.12
  6. Step 6: Final answer
    x = 260.66

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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.