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Finding the Fourth Proportional to 272.61, 408.74 and 156.92

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Solution

The fourth proportional to 272.61, 408.74 and 156.92 is: 235.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.61 : 408.74 = 156.92 : x
  2. Step 2: Convert to fraction form
    272.61/408.74 = 156.92/x
  3. Step 3: Cross multiply
    272.61x = 408.74 × 156.92
  4. Step 4: Simplify right side
    272.61x = 64,136.65
  5. Step 5: Solve for x
    x = 64,136.65/272.61
  6. Step 6: Final answer
    x = 235.27

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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.