Home / 1,135.12-1,558.97-1,003.96

Finding the Fourth Proportional to 1,135.12, 1,558.97 and 1,003.96

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Solution

The fourth proportional to 1,135.12, 1,558.97 and 1,003.96 is: 1,378.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.12 : 1,558.97 = 1,003.96 : x
  2. Step 2: Convert to fraction form
    1,135.12/1,558.97 = 1,003.96/x
  3. Step 3: Cross multiply
    1,135.12x = 1,558.97 × 1,003.96
  4. Step 4: Simplify right side
    1,135.12x = 1,565,143.52
  5. Step 5: Solve for x
    x = 1,565,143.52/1,135.12
  6. Step 6: Final answer
    x = 1,378.84

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.