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Finding the Fourth Proportional to 804.12, 1,109.72 and 454.84

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Solution

The fourth proportional to 804.12, 1,109.72 and 454.84 is: 627.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.12 : 1,109.72 = 454.84 : x
  2. Step 2: Convert to fraction form
    804.12/1,109.72 = 454.84/x
  3. Step 3: Cross multiply
    804.12x = 1,109.72 × 454.84
  4. Step 4: Simplify right side
    804.12x = 504,745.04
  5. Step 5: Solve for x
    x = 504,745.04/804.12
  6. Step 6: Final answer
    x = 627.70

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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.