Home / 1,091.15-1,504.19-828.71

Finding the Fourth Proportional to 1,091.15, 1,504.19 and 828.71

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Solution

The fourth proportional to 1,091.15, 1,504.19 and 828.71 is: 1,142.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.15 : 1,504.19 = 828.71 : x
  2. Step 2: Convert to fraction form
    1,091.15/1,504.19 = 828.71/x
  3. Step 3: Cross multiply
    1,091.15x = 1,504.19 × 828.71
  4. Step 4: Simplify right side
    1,091.15x = 1,246,531.85
  5. Step 5: Solve for x
    x = 1,246,531.85/1,091.15
  6. Step 6: Final answer
    x = 1,142.41

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1.5x scale

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.