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Finding the Fourth Proportional to 329.61, 494.64 and 192.69

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Solution

The fourth proportional to 329.61, 494.64 and 192.69 is: 289.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.61 : 494.64 = 192.69 : x
  2. Step 2: Convert to fraction form
    329.61/494.64 = 192.69/x
  3. Step 3: Cross multiply
    329.61x = 494.64 × 192.69
  4. Step 4: Simplify right side
    329.61x = 95,312.18
  5. Step 5: Solve for x
    x = 95,312.18/329.61
  6. Step 6: Final answer
    x = 289.17

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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.