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Finding the Fourth Proportional to 272.90, 376.68 and 190

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Solution

The fourth proportional to 272.90, 376.68 and 190 is: 262.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.90 : 376.68 = 190 : x
  2. Step 2: Convert to fraction form
    272.90/376.68 = 190/x
  3. Step 3: Cross multiply
    272.90x = 376.68 × 190
  4. Step 4: Simplify right side
    272.90x = 71,569.20
  5. Step 5: Solve for x
    x = 71,569.20/272.90
  6. Step 6: Final answer
    x = 262.25

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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.