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Finding the Fourth Proportional to 296.75, 409.61 and 172.44

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Solution

The fourth proportional to 296.75, 409.61 and 172.44 is: 238.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.75 : 409.61 = 172.44 : x
  2. Step 2: Convert to fraction form
    296.75/409.61 = 172.44/x
  3. Step 3: Cross multiply
    296.75x = 409.61 × 172.44
  4. Step 4: Simplify right side
    296.75x = 70,633.15
  5. Step 5: Solve for x
    x = 70,633.15/296.75
  6. Step 6: Final answer
    x = 238.02

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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.