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Finding the Fourth Proportional to 679.20, 937.34 and 380.48

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Solution

The fourth proportional to 679.20, 937.34 and 380.48 is: 525.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.20 : 937.34 = 380.48 : x
  2. Step 2: Convert to fraction form
    679.20/937.34 = 380.48/x
  3. Step 3: Cross multiply
    679.20x = 937.34 × 380.48
  4. Step 4: Simplify right side
    679.20x = 356,635.39
  5. Step 5: Solve for x
    x = 356,635.39/679.20
  6. Step 6: Final answer
    x = 525.08

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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.