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Finding the Fourth Proportional to 296.30, 408.90 and 172

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Solution

The fourth proportional to 296.30, 408.90 and 172 is: 237.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.30 : 408.90 = 172 : x
  2. Step 2: Convert to fraction form
    296.30/408.90 = 172/x
  3. Step 3: Cross multiply
    296.30x = 408.90 × 172
  4. Step 4: Simplify right side
    296.30x = 70,330.80
  5. Step 5: Solve for x
    x = 70,330.80/296.30
  6. Step 6: Final answer
    x = 237.36

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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.