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Finding the Fourth Proportional to 679.80, 937 and 539.68

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Solution

The fourth proportional to 679.80, 937 and 539.68 is: 743.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.80 : 937 = 539.68 : x
  2. Step 2: Convert to fraction form
    679.80/937 = 539.68/x
  3. Step 3: Cross multiply
    679.80x = 937 × 539.68
  4. Step 4: Simplify right side
    679.80x = 505,680.16
  5. Step 5: Solve for x
    x = 505,680.16/679.80
  6. Step 6: Final answer
    x = 743.87

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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.