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Finding the Fourth Proportional to 375.72, 518.40 and 235.86

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Solution

The fourth proportional to 375.72, 518.40 and 235.86 is: 325.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.72 : 518.40 = 235.86 : x
  2. Step 2: Convert to fraction form
    375.72/518.40 = 235.86/x
  3. Step 3: Cross multiply
    375.72x = 518.40 × 235.86
  4. Step 4: Simplify right side
    375.72x = 122,269.82
  5. Step 5: Solve for x
    x = 122,269.82/375.72
  6. Step 6: Final answer
    x = 325.43

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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.