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Finding the Fourth Proportional to 539.16, 744.72 and 399.48

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Solution

The fourth proportional to 539.16, 744.72 and 399.48 is: 551.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.16 : 744.72 = 399.48 : x
  2. Step 2: Convert to fraction form
    539.16/744.72 = 399.48/x
  3. Step 3: Cross multiply
    539.16x = 744.72 × 399.48
  4. Step 4: Simplify right side
    539.16x = 297,500.75
  5. Step 5: Solve for x
    x = 297,500.75/539.16
  6. Step 6: Final answer
    x = 551.79

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.