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Finding the Fourth Proportional to 1,048.94, 1,447.48 and 629.21

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Solution

The fourth proportional to 1,048.94, 1,447.48 and 629.21 is: 868.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.94 : 1,447.48 = 629.21 : x
  2. Step 2: Convert to fraction form
    1,048.94/1,447.48 = 629.21/x
  3. Step 3: Cross multiply
    1,048.94x = 1,447.48 × 629.21
  4. Step 4: Simplify right side
    1,048.94x = 910,767.46
  5. Step 5: Solve for x
    x = 910,767.46/1,048.94
  6. Step 6: Final answer
    x = 868.27

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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.