Home / 1,247.13-1,867.78-629.33

Finding the Fourth Proportional to 1,247.13, 1,867.78 and 629.33

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Solution

The fourth proportional to 1,247.13, 1,867.78 and 629.33 is: 942.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.13 : 1,867.78 = 629.33 : x
  2. Step 2: Convert to fraction form
    1,247.13/1,867.78 = 629.33/x
  3. Step 3: Cross multiply
    1,247.13x = 1,867.78 × 629.33
  4. Step 4: Simplify right side
    1,247.13x = 1,175,452.36
  5. Step 5: Solve for x
    x = 1,175,452.36/1,247.13
  6. Step 6: Final answer
    x = 942.53

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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.