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Finding the Fourth Proportional to 539.06, 743.79 and 317.93

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Solution

The fourth proportional to 539.06, 743.79 and 317.93 is: 438.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.06 : 743.79 = 317.93 : x
  2. Step 2: Convert to fraction form
    539.06/743.79 = 317.93/x
  3. Step 3: Cross multiply
    539.06x = 743.79 × 317.93
  4. Step 4: Simplify right side
    539.06x = 236,475.01
  5. Step 5: Solve for x
    x = 236,475.01/539.06
  6. Step 6: Final answer
    x = 438.68

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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.