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Finding the Fourth Proportional to 2,659.64, 3,985.35 and 1,425.80

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Solution

The fourth proportional to 2,659.64, 3,985.35 and 1,425.80 is: 2,136.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,659.64 : 3,985.35 = 1,425.80 : x
  2. Step 2: Convert to fraction form
    2,659.64/3,985.35 = 1,425.80/x
  3. Step 3: Cross multiply
    2,659.64x = 3,985.35 × 1,425.80
  4. Step 4: Simplify right side
    2,659.64x = 5,682,324.67
  5. Step 5: Solve for x
    x = 5,682,324.67/2,659.64
  6. Step 6: Final answer
    x = 2,136.51

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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.