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Finding the Fourth Proportional to 631.80, 860.19 and 629.85

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Solution

The fourth proportional to 631.80, 860.19 and 629.85 is: 857.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.80 : 860.19 = 629.85 : x
  2. Step 2: Convert to fraction form
    631.80/860.19 = 629.85/x
  3. Step 3: Cross multiply
    631.80x = 860.19 × 629.85
  4. Step 4: Simplify right side
    631.80x = 541,790.67
  5. Step 5: Solve for x
    x = 541,790.67/631.80
  6. Step 6: Final answer
    x = 857.54

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.