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Finding the Fourth Proportional to 539.60, 743.64 and 381.92

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Solution

The fourth proportional to 539.60, 743.64 and 381.92 is: 526.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.60 : 743.64 = 381.92 : x
  2. Step 2: Convert to fraction form
    539.60/743.64 = 381.92/x
  3. Step 3: Cross multiply
    539.60x = 743.64 × 381.92
  4. Step 4: Simplify right side
    539.60x = 284,010.99
  5. Step 5: Solve for x
    x = 284,010.99/539.60
  6. Step 6: Final answer
    x = 526.34

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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.