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Finding the Fourth Proportional to 682.60, 1,023.90 and 629.80

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Solution

The fourth proportional to 682.60, 1,023.90 and 629.80 is: 944.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.60 : 1,023.90 = 629.80 : x
  2. Step 2: Convert to fraction form
    682.60/1,023.90 = 629.80/x
  3. Step 3: Cross multiply
    682.60x = 1,023.90 × 629.80
  4. Step 4: Simplify right side
    682.60x = 644,852.22
  5. Step 5: Solve for x
    x = 644,852.22/682.60
  6. Step 6: Final answer
    x = 944.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.