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Finding the Fourth Proportional to 395.36, 592.80 and 121.38

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Solution

The fourth proportional to 395.36, 592.80 and 121.38 is: 182.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.36 : 592.80 = 121.38 : x
  2. Step 2: Convert to fraction form
    395.36/592.80 = 121.38/x
  3. Step 3: Cross multiply
    395.36x = 592.80 × 121.38
  4. Step 4: Simplify right side
    395.36x = 71,954.06
  5. Step 5: Solve for x
    x = 71,954.06/395.36
  6. Step 6: Final answer
    x = 182.00

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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.