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Finding the Fourth Proportional to 329.12, 493.75 and 123.69

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Solution

The fourth proportional to 329.12, 493.75 and 123.69 is: 185.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.12 : 493.75 = 123.69 : x
  2. Step 2: Convert to fraction form
    329.12/493.75 = 123.69/x
  3. Step 3: Cross multiply
    329.12x = 493.75 × 123.69
  4. Step 4: Simplify right side
    329.12x = 61,071.94
  5. Step 5: Solve for x
    x = 61,071.94/329.12
  6. Step 6: Final answer
    x = 185.56

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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.