Home / 2,480.40-3,720.18-836.79

Finding the Fourth Proportional to 2,480.40, 3,720.18 and 836.79

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Solution

The fourth proportional to 2,480.40, 3,720.18 and 836.79 is: 1,255.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,480.40 : 3,720.18 = 836.79 : x
  2. Step 2: Convert to fraction form
    2,480.40/3,720.18 = 836.79/x
  3. Step 3: Cross multiply
    2,480.40x = 3,720.18 × 836.79
  4. Step 4: Simplify right side
    2,480.40x = 3,113,009.42
  5. Step 5: Solve for x
    x = 3,113,009.42/2,480.40
  6. Step 6: Final answer
    x = 1,255.04

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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.