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Finding the Fourth Proportional to 804.43, 1,109.78 and 617.59

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Solution

The fourth proportional to 804.43, 1,109.78 and 617.59 is: 852.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.43 : 1,109.78 = 617.59 : x
  2. Step 2: Convert to fraction form
    804.43/1,109.78 = 617.59/x
  3. Step 3: Cross multiply
    804.43x = 1,109.78 × 617.59
  4. Step 4: Simplify right side
    804.43x = 685,389.03
  5. Step 5: Solve for x
    x = 685,389.03/804.43
  6. Step 6: Final answer
    x = 852.02

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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.