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Finding the Fourth Proportional to 369.42, 509.81 and 238.48

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Solution

The fourth proportional to 369.42, 509.81 and 238.48 is: 329.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.42 : 509.81 = 238.48 : x
  2. Step 2: Convert to fraction form
    369.42/509.81 = 238.48/x
  3. Step 3: Cross multiply
    369.42x = 509.81 × 238.48
  4. Step 4: Simplify right side
    369.42x = 121,579.49
  5. Step 5: Solve for x
    x = 121,579.49/369.42
  6. Step 6: Final answer
    x = 329.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.