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Finding the Fourth Proportional to 539.41, 744.27 and 318.31

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Solution

The fourth proportional to 539.41, 744.27 and 318.31 is: 439.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.41 : 744.27 = 318.31 : x
  2. Step 2: Convert to fraction form
    539.41/744.27 = 318.31/x
  3. Step 3: Cross multiply
    539.41x = 744.27 × 318.31
  4. Step 4: Simplify right side
    539.41x = 236,908.58
  5. Step 5: Solve for x
    x = 236,908.58/539.41
  6. Step 6: Final answer
    x = 439.20

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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.