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Finding the Fourth Proportional to 679.56, 937.86 and 446.28

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Solution

The fourth proportional to 679.56, 937.86 and 446.28 is: 615.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.56 : 937.86 = 446.28 : x
  2. Step 2: Convert to fraction form
    679.56/937.86 = 446.28/x
  3. Step 3: Cross multiply
    679.56x = 937.86 × 446.28
  4. Step 4: Simplify right side
    679.56x = 418,548.16
  5. Step 5: Solve for x
    x = 418,548.16/679.56
  6. Step 6: Final answer
    x = 615.91

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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.