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Finding the Fourth Proportional to 804.22, 1,109.88 and 454.91

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Solution

The fourth proportional to 804.22, 1,109.88 and 454.91 is: 627.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.22 : 1,109.88 = 454.91 : x
  2. Step 2: Convert to fraction form
    804.22/1,109.88 = 454.91/x
  3. Step 3: Cross multiply
    804.22x = 1,109.88 × 454.91
  4. Step 4: Simplify right side
    804.22x = 504,895.51
  5. Step 5: Solve for x
    x = 504,895.51/804.22
  6. Step 6: Final answer
    x = 627.81

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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.