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Finding the Fourth Proportional to 539.07, 743.67 and 391.44

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Solution

The fourth proportional to 539.07, 743.67 and 391.44 is: 540.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.07 : 743.67 = 391.44 : x
  2. Step 2: Convert to fraction form
    539.07/743.67 = 391.44/x
  3. Step 3: Cross multiply
    539.07x = 743.67 × 391.44
  4. Step 4: Simplify right side
    539.07x = 291,102.18
  5. Step 5: Solve for x
    x = 291,102.18/539.07
  6. Step 6: Final answer
    x = 540.01

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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.