Home / 2,135.28-3,201.96-836.40

Finding the Fourth Proportional to 2,135.28, 3,201.96 and 836.40

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Solution

The fourth proportional to 2,135.28, 3,201.96 and 836.40 is: 1,254.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.28 : 3,201.96 = 836.40 : x
  2. Step 2: Convert to fraction form
    2,135.28/3,201.96 = 836.40/x
  3. Step 3: Cross multiply
    2,135.28x = 3,201.96 × 836.40
  4. Step 4: Simplify right side
    2,135.28x = 2,678,119.34
  5. Step 5: Solve for x
    x = 2,678,119.34/2,135.28
  6. Step 6: Final answer
    x = 1,254.22

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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.