Home / 1,409.43-2,112.30-629.67

Finding the Fourth Proportional to 1,409.43, 2,112.30 and 629.67

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Solution

The fourth proportional to 1,409.43, 2,112.30 and 629.67 is: 943.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.43 : 2,112.30 = 629.67 : x
  2. Step 2: Convert to fraction form
    1,409.43/2,112.30 = 629.67/x
  3. Step 3: Cross multiply
    1,409.43x = 2,112.30 × 629.67
  4. Step 4: Simplify right side
    1,409.43x = 1,330,051.94
  5. Step 5: Solve for x
    x = 1,330,051.94/1,409.43
  6. Step 6: Final answer
    x = 943.68

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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.