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Finding the Fourth Proportional to 379.20, 519.89 and 372.26

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Solution

The fourth proportional to 379.20, 519.89 and 372.26 is: 510.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.20 : 519.89 = 372.26 : x
  2. Step 2: Convert to fraction form
    379.20/519.89 = 372.26/x
  3. Step 3: Cross multiply
    379.20x = 519.89 × 372.26
  4. Step 4: Simplify right side
    379.20x = 193,529.79
  5. Step 5: Solve for x
    x = 193,529.79/379.20
  6. Step 6: Final answer
    x = 510.36

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.