Home / 3,457.12-5,187.83-1,405.12

Finding the Fourth Proportional to 3,457.12, 5,187.83 and 1,405.12

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Solution

The fourth proportional to 3,457.12, 5,187.83 and 1,405.12 is: 2,108.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,457.12 : 5,187.83 = 1,405.12 : x
  2. Step 2: Convert to fraction form
    3,457.12/5,187.83 = 1,405.12/x
  3. Step 3: Cross multiply
    3,457.12x = 5,187.83 × 1,405.12
  4. Step 4: Simplify right side
    3,457.12x = 7,289,523.69
  5. Step 5: Solve for x
    x = 7,289,523.69/3,457.12
  6. Step 6: Final answer
    x = 2,108.55

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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.