Home / 1,131.76-1,699.26-1,112.32

Finding the Fourth Proportional to 1,131.76, 1,699.26 and 1,112.32

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Solution

The fourth proportional to 1,131.76, 1,699.26 and 1,112.32 is: 1,670.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.76 : 1,699.26 = 1,112.32 : x
  2. Step 2: Convert to fraction form
    1,131.76/1,699.26 = 1,112.32/x
  3. Step 3: Cross multiply
    1,131.76x = 1,699.26 × 1,112.32
  4. Step 4: Simplify right side
    1,131.76x = 1,890,120.88
  5. Step 5: Solve for x
    x = 1,890,120.88/1,131.76
  6. Step 6: Final answer
    x = 1,670.07

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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.