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Finding the Fourth Proportional to 538.43, 806.01 and 487.09

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Solution

The fourth proportional to 538.43, 806.01 and 487.09 is: 729.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.43 : 806.01 = 487.09 : x
  2. Step 2: Convert to fraction form
    538.43/806.01 = 487.09/x
  3. Step 3: Cross multiply
    538.43x = 806.01 × 487.09
  4. Step 4: Simplify right side
    538.43x = 392,595.38
  5. Step 5: Solve for x
    x = 392,595.38/538.43
  6. Step 6: Final answer
    x = 729.15

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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.