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Finding the Fourth Proportional to 539.73, 744.53 and 392.10

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Solution

The fourth proportional to 539.73, 744.53 and 392.10 is: 540.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.73 : 744.53 = 392.10 : x
  2. Step 2: Convert to fraction form
    539.73/744.53 = 392.10/x
  3. Step 3: Cross multiply
    539.73x = 744.53 × 392.10
  4. Step 4: Simplify right side
    539.73x = 291,928.25
  5. Step 5: Solve for x
    x = 291,928.25/539.73
  6. Step 6: Final answer
    x = 540.88

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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.