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Finding the Fourth Proportional to 819.62, 1,131.58 and 609.56

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Solution

The fourth proportional to 819.62, 1,131.58 and 609.56 is: 841.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.62 : 1,131.58 = 609.56 : x
  2. Step 2: Convert to fraction form
    819.62/1,131.58 = 609.56/x
  3. Step 3: Cross multiply
    819.62x = 1,131.58 × 609.56
  4. Step 4: Simplify right side
    819.62x = 689,765.25
  5. Step 5: Solve for x
    x = 689,765.25/819.62
  6. Step 6: Final answer
    x = 841.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.