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Finding the Fourth Proportional to 379.63, 520.49 and 372.34

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Solution

The fourth proportional to 379.63, 520.49 and 372.34 is: 510.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.63 : 520.49 = 372.34 : x
  2. Step 2: Convert to fraction form
    379.63/520.49 = 372.34/x
  3. Step 3: Cross multiply
    379.63x = 520.49 × 372.34
  4. Step 4: Simplify right side
    379.63x = 193,799.25
  5. Step 5: Solve for x
    x = 193,799.25/379.63
  6. Step 6: Final answer
    x = 510.50

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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.