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Finding the Fourth Proportional to 804.67, 1,109.23 and 629.71

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Solution

The fourth proportional to 804.67, 1,109.23 and 629.71 is: 868.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.67 : 1,109.23 = 629.71 : x
  2. Step 2: Convert to fraction form
    804.67/1,109.23 = 629.71/x
  3. Step 3: Cross multiply
    804.67x = 1,109.23 × 629.71
  4. Step 4: Simplify right side
    804.67x = 698,493.22
  5. Step 5: Solve for x
    x = 698,493.22/804.67
  6. Step 6: Final answer
    x = 868.05

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1.5x scale

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.