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Finding the Fourth Proportional to 1,048.62, 1,447.34 and 629.22

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Solution

The fourth proportional to 1,048.62, 1,447.34 and 629.22 is: 868.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.62 : 1,447.34 = 629.22 : x
  2. Step 2: Convert to fraction form
    1,048.62/1,447.34 = 629.22/x
  3. Step 3: Cross multiply
    1,048.62x = 1,447.34 × 629.22
  4. Step 4: Simplify right side
    1,048.62x = 910,692.13
  5. Step 5: Solve for x
    x = 910,692.13/1,048.62
  6. Step 6: Final answer
    x = 868.47

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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.