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Finding the Fourth Proportional to 375.80, 518.78 and 235.99

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Solution

The fourth proportional to 375.80, 518.78 and 235.99 is: 325.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.80 : 518.78 = 235.99 : x
  2. Step 2: Convert to fraction form
    375.80/518.78 = 235.99/x
  3. Step 3: Cross multiply
    375.80x = 518.78 × 235.99
  4. Step 4: Simplify right side
    375.80x = 122,427.48
  5. Step 5: Solve for x
    x = 122,427.48/375.80
  6. Step 6: Final answer
    x = 325.78

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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.