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Finding the Fourth Proportional to 538.98, 808.63 and 265.09

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Solution

The fourth proportional to 538.98, 808.63 and 265.09 is: 397.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.98 : 808.63 = 265.09 : x
  2. Step 2: Convert to fraction form
    538.98/808.63 = 265.09/x
  3. Step 3: Cross multiply
    538.98x = 808.63 × 265.09
  4. Step 4: Simplify right side
    538.98x = 214,359.73
  5. Step 5: Solve for x
    x = 214,359.73/538.98
  6. Step 6: Final answer
    x = 397.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.