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Finding the Fourth Proportional to 538.19, 811.44 and 431.27

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Solution

The fourth proportional to 538.19, 811.44 and 431.27 is: 650.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.19 : 811.44 = 431.27 : x
  2. Step 2: Convert to fraction form
    538.19/811.44 = 431.27/x
  3. Step 3: Cross multiply
    538.19x = 811.44 × 431.27
  4. Step 4: Simplify right side
    538.19x = 349,949.73
  5. Step 5: Solve for x
    x = 349,949.73/538.19
  6. Step 6: Final answer
    x = 650.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.