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Finding the Fourth Proportional to 538.65, 743.43 and 317.59

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Solution

The fourth proportional to 538.65, 743.43 and 317.59 is: 438.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.65 : 743.43 = 317.59 : x
  2. Step 2: Convert to fraction form
    538.65/743.43 = 317.59/x
  3. Step 3: Cross multiply
    538.65x = 743.43 × 317.59
  4. Step 4: Simplify right side
    538.65x = 236,105.27
  5. Step 5: Solve for x
    x = 236,105.27/538.65
  6. Step 6: Final answer
    x = 438.33

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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.