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Finding the Fourth Proportional to 809.14, 1,213.71 and 536.97

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Solution

The fourth proportional to 809.14, 1,213.71 and 536.97 is: 805.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.14 : 1,213.71 = 536.97 : x
  2. Step 2: Convert to fraction form
    809.14/1,213.71 = 536.97/x
  3. Step 3: Cross multiply
    809.14x = 1,213.71 × 536.97
  4. Step 4: Simplify right side
    809.14x = 651,725.86
  5. Step 5: Solve for x
    x = 651,725.86/809.14
  6. Step 6: Final answer
    x = 805.46

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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.