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Finding the Fourth Proportional to 196.78, 293.45 and 174.65

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Solution

The fourth proportional to 196.78, 293.45 and 174.65 is: 260.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.78 : 293.45 = 174.65 : x
  2. Step 2: Convert to fraction form
    196.78/293.45 = 174.65/x
  3. Step 3: Cross multiply
    196.78x = 293.45 × 174.65
  4. Step 4: Simplify right side
    196.78x = 51,251.89
  5. Step 5: Solve for x
    x = 51,251.89/196.78
  6. Step 6: Final answer
    x = 260.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.