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Finding the Fourth Proportional to 272.86, 409.21 and 118.75

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Solution

The fourth proportional to 272.86, 409.21 and 118.75 is: 178.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.86 : 409.21 = 118.75 : x
  2. Step 2: Convert to fraction form
    272.86/409.21 = 118.75/x
  3. Step 3: Cross multiply
    272.86x = 409.21 × 118.75
  4. Step 4: Simplify right side
    272.86x = 48,592.36
  5. Step 5: Solve for x
    x = 48,592.36/272.86
  6. Step 6: Final answer
    x = 178.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.