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Finding the Fourth Proportional to 539.09, 743.76 and 342.57

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Solution

The fourth proportional to 539.09, 743.76 and 342.57 is: 472.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.09 : 743.76 = 342.57 : x
  2. Step 2: Convert to fraction form
    539.09/743.76 = 342.57/x
  3. Step 3: Cross multiply
    539.09x = 743.76 × 342.57
  4. Step 4: Simplify right side
    539.09x = 254,789.86
  5. Step 5: Solve for x
    x = 254,789.86/539.09
  6. Step 6: Final answer
    x = 472.63

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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.