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Finding the Fourth Proportional to 369.45, 509.58 and 238.35

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Solution

The fourth proportional to 369.45, 509.58 and 238.35 is: 328.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.45 : 509.58 = 238.35 : x
  2. Step 2: Convert to fraction form
    369.45/509.58 = 238.35/x
  3. Step 3: Cross multiply
    369.45x = 509.58 × 238.35
  4. Step 4: Simplify right side
    369.45x = 121,458.39
  5. Step 5: Solve for x
    x = 121,458.39/369.45
  6. Step 6: Final answer
    x = 328.75

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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.