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Finding the Fourth Proportional to 196.64, 295.08 and 128.36

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Solution

The fourth proportional to 196.64, 295.08 and 128.36 is: 192.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.64 : 295.08 = 128.36 : x
  2. Step 2: Convert to fraction form
    196.64/295.08 = 128.36/x
  3. Step 3: Cross multiply
    196.64x = 295.08 × 128.36
  4. Step 4: Simplify right side
    196.64x = 37,876.47
  5. Step 5: Solve for x
    x = 37,876.47/196.64
  6. Step 6: Final answer
    x = 192.62

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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.