Home / 1,131.04-1,696.56-720.37

Finding the Fourth Proportional to 1,131.04, 1,696.56 and 720.37

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Solution

The fourth proportional to 1,131.04, 1,696.56 and 720.37 is: 1,080.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.04 : 1,696.56 = 720.37 : x
  2. Step 2: Convert to fraction form
    1,131.04/1,696.56 = 720.37/x
  3. Step 3: Cross multiply
    1,131.04x = 1,696.56 × 720.37
  4. Step 4: Simplify right side
    1,131.04x = 1,222,150.93
  5. Step 5: Solve for x
    x = 1,222,150.93/1,131.04
  6. Step 6: Final answer
    x = 1,080.56

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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.