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Finding the Fourth Proportional to 804.72, 1,110.54 and 629.76

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Solution

The fourth proportional to 804.72, 1,110.54 and 629.76 is: 869.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.72 : 1,110.54 = 629.76 : x
  2. Step 2: Convert to fraction form
    804.72/1,110.54 = 629.76/x
  3. Step 3: Cross multiply
    804.72x = 1,110.54 × 629.76
  4. Step 4: Simplify right side
    804.72x = 699,373.67
  5. Step 5: Solve for x
    x = 699,373.67/804.72
  6. Step 6: Final answer
    x = 869.09

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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.