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Finding the Fourth Proportional to 369.37, 509.45 and 255.85

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Solution

The fourth proportional to 369.37, 509.45 and 255.85 is: 352.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.37 : 509.45 = 255.85 : x
  2. Step 2: Convert to fraction form
    369.37/509.45 = 255.85/x
  3. Step 3: Cross multiply
    369.37x = 509.45 × 255.85
  4. Step 4: Simplify right side
    369.37x = 130,340.24
  5. Step 5: Solve for x
    x = 130,340.24/369.37
  6. Step 6: Final answer
    x = 352.88

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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.