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Finding the Fourth Proportional to 679.46, 937.69 and 380.73

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Solution

The fourth proportional to 679.46, 937.69 and 380.73 is: 525.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.46 : 937.69 = 380.73 : x
  2. Step 2: Convert to fraction form
    679.46/937.69 = 380.73/x
  3. Step 3: Cross multiply
    679.46x = 937.69 × 380.73
  4. Step 4: Simplify right side
    679.46x = 357,006.71
  5. Step 5: Solve for x
    x = 357,006.71/679.46
  6. Step 6: Final answer
    x = 525.43

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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.