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Finding the Fourth Proportional to 369.54, 509.76 and 238.68

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Solution

The fourth proportional to 369.54, 509.76 and 238.68 is: 329.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.54 : 509.76 = 238.68 : x
  2. Step 2: Convert to fraction form
    369.54/509.76 = 238.68/x
  3. Step 3: Cross multiply
    369.54x = 509.76 × 238.68
  4. Step 4: Simplify right side
    369.54x = 121,669.52
  5. Step 5: Solve for x
    x = 121,669.52/369.54
  6. Step 6: Final answer
    x = 329.25

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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.