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Finding the Fourth Proportional to 296.98, 409.82 and 172.64

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Solution

The fourth proportional to 296.98, 409.82 and 172.64 is: 238.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.98 : 409.82 = 172.64 : x
  2. Step 2: Convert to fraction form
    296.98/409.82 = 172.64/x
  3. Step 3: Cross multiply
    296.98x = 409.82 × 172.64
  4. Step 4: Simplify right side
    296.98x = 70,749.28
  5. Step 5: Solve for x
    x = 70,749.28/296.98
  6. Step 6: Final answer
    x = 238.23

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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.