Home / 1,131.12-1,556.91-1,012.68

Finding the Fourth Proportional to 1,131.12, 1,556.91 and 1,012.68

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Solution

The fourth proportional to 1,131.12, 1,556.91 and 1,012.68 is: 1,393.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.12 : 1,556.91 = 1,012.68 : x
  2. Step 2: Convert to fraction form
    1,131.12/1,556.91 = 1,012.68/x
  3. Step 3: Cross multiply
    1,131.12x = 1,556.91 × 1,012.68
  4. Step 4: Simplify right side
    1,131.12x = 1,576,651.62
  5. Step 5: Solve for x
    x = 1,576,651.62/1,131.12
  6. Step 6: Final answer
    x = 1,393.89

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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.