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Finding the Fourth Proportional to 196.47, 294.53 and 138.51

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Solution

The fourth proportional to 196.47, 294.53 and 138.51 is: 207.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.47 : 294.53 = 138.51 : x
  2. Step 2: Convert to fraction form
    196.47/294.53 = 138.51/x
  3. Step 3: Cross multiply
    196.47x = 294.53 × 138.51
  4. Step 4: Simplify right side
    196.47x = 40,794.66
  5. Step 5: Solve for x
    x = 40,794.66/196.47
  6. Step 6: Final answer
    x = 207.64

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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.