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Finding the Fourth Proportional to 539.54, 744.36 and 318.41

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Solution

The fourth proportional to 539.54, 744.36 and 318.41 is: 439.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.54 : 744.36 = 318.41 : x
  2. Step 2: Convert to fraction form
    539.54/744.36 = 318.41/x
  3. Step 3: Cross multiply
    539.54x = 744.36 × 318.41
  4. Step 4: Simplify right side
    539.54x = 237,011.67
  5. Step 5: Solve for x
    x = 237,011.67/539.54
  6. Step 6: Final answer
    x = 439.28

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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.