Home / 3,239.60-4,861.40-1,291.60

Finding the Fourth Proportional to 3,239.60, 4,861.40 and 1,291.60

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Solution

The fourth proportional to 3,239.60, 4,861.40 and 1,291.60 is: 1,938.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,239.60 : 4,861.40 = 1,291.60 : x
  2. Step 2: Convert to fraction form
    3,239.60/4,861.40 = 1,291.60/x
  3. Step 3: Cross multiply
    3,239.60x = 4,861.40 × 1,291.60
  4. Step 4: Simplify right side
    3,239.60x = 6,278,984.24
  5. Step 5: Solve for x
    x = 6,278,984.24/3,239.60
  6. Step 6: Final answer
    x = 1,938.20

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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.