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Finding the Fourth Proportional to 679.43, 937.54 and 380.67

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Solution

The fourth proportional to 679.43, 937.54 and 380.67 is: 525.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.43 : 937.54 = 380.67 : x
  2. Step 2: Convert to fraction form
    679.43/937.54 = 380.67/x
  3. Step 3: Cross multiply
    679.43x = 937.54 × 380.67
  4. Step 4: Simplify right side
    679.43x = 356,893.35
  5. Step 5: Solve for x
    x = 356,893.35/679.43
  6. Step 6: Final answer
    x = 525.28

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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.