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Finding the Fourth Proportional to 679.41, 938.25 and 580.59

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Solution

The fourth proportional to 679.41, 938.25 and 580.59 is: 801.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.41 : 938.25 = 580.59 : x
  2. Step 2: Convert to fraction form
    679.41/938.25 = 580.59/x
  3. Step 3: Cross multiply
    679.41x = 938.25 × 580.59
  4. Step 4: Simplify right side
    679.41x = 544,738.57
  5. Step 5: Solve for x
    x = 544,738.57/679.41
  6. Step 6: Final answer
    x = 801.78

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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.