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Finding the Fourth Proportional to 837.20, 1,154.16 and 629.84

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Solution

The fourth proportional to 837.20, 1,154.16 and 629.84 is: 868.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.20 : 1,154.16 = 629.84 : x
  2. Step 2: Convert to fraction form
    837.20/1,154.16 = 629.84/x
  3. Step 3: Cross multiply
    837.20x = 1,154.16 × 629.84
  4. Step 4: Simplify right side
    837.20x = 726,936.13
  5. Step 5: Solve for x
    x = 726,936.13/837.20
  6. Step 6: Final answer
    x = 868.29

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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.