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Finding the Fourth Proportional to 679.36, 936.96 and 574.70

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Solution

The fourth proportional to 679.36, 936.96 and 574.70 is: 792.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.36 : 936.96 = 574.70 : x
  2. Step 2: Convert to fraction form
    679.36/936.96 = 574.70/x
  3. Step 3: Cross multiply
    679.36x = 936.96 × 574.70
  4. Step 4: Simplify right side
    679.36x = 538,470.91
  5. Step 5: Solve for x
    x = 538,470.91/679.36
  6. Step 6: Final answer
    x = 792.61

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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.