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Finding the Fourth Proportional to 538.43, 811.27 and 487.13

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Solution

The fourth proportional to 538.43, 811.27 and 487.13 is: 733.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.43 : 811.27 = 487.13 : x
  2. Step 2: Convert to fraction form
    538.43/811.27 = 487.13/x
  3. Step 3: Cross multiply
    538.43x = 811.27 × 487.13
  4. Step 4: Simplify right side
    538.43x = 395,193.96
  5. Step 5: Solve for x
    x = 395,193.96/538.43
  6. Step 6: Final answer
    x = 733.97

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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.