Home / 2,389.28-3,581.40-1,091.60

Finding the Fourth Proportional to 2,389.28, 3,581.40 and 1,091.60

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Solution

The fourth proportional to 2,389.28, 3,581.40 and 1,091.60 is: 1,636.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389.28 : 3,581.40 = 1,091.60 : x
  2. Step 2: Convert to fraction form
    2,389.28/3,581.40 = 1,091.60/x
  3. Step 3: Cross multiply
    2,389.28x = 3,581.40 × 1,091.60
  4. Step 4: Simplify right side
    2,389.28x = 3,909,456.24
  5. Step 5: Solve for x
    x = 3,909,456.24/2,389.28
  6. Step 6: Final answer
    x = 1,636.25

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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.