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Finding the Fourth Proportional to 539.49, 744.33 and 318.52

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Solution

The fourth proportional to 539.49, 744.33 and 318.52 is: 439.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.49 : 744.33 = 318.52 : x
  2. Step 2: Convert to fraction form
    539.49/744.33 = 318.52/x
  3. Step 3: Cross multiply
    539.49x = 744.33 × 318.52
  4. Step 4: Simplify right side
    539.49x = 237,083.99
  5. Step 5: Solve for x
    x = 237,083.99/539.49
  6. Step 6: Final answer
    x = 439.46

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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.