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Finding the Fourth Proportional to 3,609.60, 5,407.08 and 1,659.64

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Solution

The fourth proportional to 3,609.60, 5,407.08 and 1,659.64 is: 2,486.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,609.60 : 5,407.08 = 1,659.64 : x
  2. Step 2: Convert to fraction form
    3,609.60/5,407.08 = 1,659.64/x
  3. Step 3: Cross multiply
    3,609.60x = 5,407.08 × 1,659.64
  4. Step 4: Simplify right side
    3,609.60x = 8,973,806.25
  5. Step 5: Solve for x
    x = 8,973,806.25/3,609.60
  6. Step 6: Final answer
    x = 2,486.09

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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.