Home / 3,638.12-5,457.80-1,329.60

Finding the Fourth Proportional to 3,638.12, 5,457.80 and 1,329.60

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Solution

The fourth proportional to 3,638.12, 5,457.80 and 1,329.60 is: 1,994.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638.12 : 5,457.80 = 1,329.60 : x
  2. Step 2: Convert to fraction form
    3,638.12/5,457.80 = 1,329.60/x
  3. Step 3: Cross multiply
    3,638.12x = 5,457.80 × 1,329.60
  4. Step 4: Simplify right side
    3,638.12x = 7,256,690.88
  5. Step 5: Solve for x
    x = 7,256,690.88/3,638.12
  6. Step 6: Final answer
    x = 1,994.63

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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.