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Finding the Fourth Proportional to 539.06, 743.87 and 318.02

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Solution

The fourth proportional to 539.06, 743.87 and 318.02 is: 438.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.06 : 743.87 = 318.02 : x
  2. Step 2: Convert to fraction form
    539.06/743.87 = 318.02/x
  3. Step 3: Cross multiply
    539.06x = 743.87 × 318.02
  4. Step 4: Simplify right side
    539.06x = 236,562.61
  5. Step 5: Solve for x
    x = 236,562.61/539.06
  6. Step 6: Final answer
    x = 438.85

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.