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Finding the Fourth Proportional to 539.51, 744.50 and 318.53

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Solution

The fourth proportional to 539.51, 744.50 and 318.53 is: 439.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.51 : 744.50 = 318.53 : x
  2. Step 2: Convert to fraction form
    539.51/744.50 = 318.53/x
  3. Step 3: Cross multiply
    539.51x = 744.50 × 318.53
  4. Step 4: Simplify right side
    539.51x = 237,145.85
  5. Step 5: Solve for x
    x = 237,145.85/539.51
  6. Step 6: Final answer
    x = 439.56

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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.