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Finding the Fourth Proportional to 2,479.97, 3,720.33 and 836.15

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Solution

The fourth proportional to 2,479.97, 3,720.33 and 836.15 is: 1,254.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.97 : 3,720.33 = 836.15 : x
  2. Step 2: Convert to fraction form
    2,479.97/3,720.33 = 836.15/x
  3. Step 3: Cross multiply
    2,479.97x = 3,720.33 × 836.15
  4. Step 4: Simplify right side
    2,479.97x = 3,110,735.33
  5. Step 5: Solve for x
    x = 3,110,735.33/2,479.97
  6. Step 6: Final answer
    x = 1,254.35

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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.