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Finding the Fourth Proportional to 1,101.29, 1,520.08 and 629.44

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Solution

The fourth proportional to 1,101.29, 1,520.08 and 629.44 is: 868.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.29 : 1,520.08 = 629.44 : x
  2. Step 2: Convert to fraction form
    1,101.29/1,520.08 = 629.44/x
  3. Step 3: Cross multiply
    1,101.29x = 1,520.08 × 629.44
  4. Step 4: Simplify right side
    1,101.29x = 956,796.01
  5. Step 5: Solve for x
    x = 956,796.01/1,101.29
  6. Step 6: Final answer
    x = 868.80

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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.