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Finding the Fourth Proportional to 375.71, 518.78 and 235.89

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Solution

The fourth proportional to 375.71, 518.78 and 235.89 is: 325.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.71 : 518.78 = 235.89 : x
  2. Step 2: Convert to fraction form
    375.71/518.78 = 235.89/x
  3. Step 3: Cross multiply
    375.71x = 518.78 × 235.89
  4. Step 4: Simplify right side
    375.71x = 122,375.60
  5. Step 5: Solve for x
    x = 122,375.60/375.71
  6. Step 6: Final answer
    x = 325.72

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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.