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Finding the Fourth Proportional to 539.48, 744.46 and 330

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Solution

The fourth proportional to 539.48, 744.46 and 330 is: 455.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.48 : 744.46 = 330 : x
  2. Step 2: Convert to fraction form
    539.48/744.46 = 330/x
  3. Step 3: Cross multiply
    539.48x = 744.46 × 330
  4. Step 4: Simplify right side
    539.48x = 245,670.98
  5. Step 5: Solve for x
    x = 245,670.98/539.48
  6. Step 6: Final answer
    x = 455.39

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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.