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Finding the Fourth Proportional to 679.15, 937.21 and 380.37

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Solution

The fourth proportional to 679.15, 937.21 and 380.37 is: 524.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.15 : 937.21 = 380.37 : x
  2. Step 2: Convert to fraction form
    679.15/937.21 = 380.37/x
  3. Step 3: Cross multiply
    679.15x = 937.21 × 380.37
  4. Step 4: Simplify right side
    679.15x = 356,486.57
  5. Step 5: Solve for x
    x = 356,486.57/679.15
  6. Step 6: Final answer
    x = 524.90

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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.