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Finding the Fourth Proportional to 539.01, 743.62 and 317.80

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Solution

The fourth proportional to 539.01, 743.62 and 317.80 is: 438.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.01 : 743.62 = 317.80 : x
  2. Step 2: Convert to fraction form
    539.01/743.62 = 317.80/x
  3. Step 3: Cross multiply
    539.01x = 743.62 × 317.80
  4. Step 4: Simplify right side
    539.01x = 236,322.44
  5. Step 5: Solve for x
    x = 236,322.44/539.01
  6. Step 6: Final answer
    x = 438.44

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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.