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Finding the Fourth Proportional to 679.64, 937.72 and 443.88

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Solution

The fourth proportional to 679.64, 937.72 and 443.88 is: 612.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.64 : 937.72 = 443.88 : x
  2. Step 2: Convert to fraction form
    679.64/937.72 = 443.88/x
  3. Step 3: Cross multiply
    679.64x = 937.72 × 443.88
  4. Step 4: Simplify right side
    679.64x = 416,235.15
  5. Step 5: Solve for x
    x = 416,235.15/679.64
  6. Step 6: Final answer
    x = 612.43

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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.