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Finding the Fourth Proportional to 2,685.52, 4,028.40 and 836.68

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Solution

The fourth proportional to 2,685.52, 4,028.40 and 836.68 is: 1,255.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.52 : 4,028.40 = 836.68 : x
  2. Step 2: Convert to fraction form
    2,685.52/4,028.40 = 836.68/x
  3. Step 3: Cross multiply
    2,685.52x = 4,028.40 × 836.68
  4. Step 4: Simplify right side
    2,685.52x = 3,370,481.71
  5. Step 5: Solve for x
    x = 3,370,481.71/2,685.52
  6. Step 6: Final answer
    x = 1,255.06

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1.5x scale

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.