Home / 2,142.07-3,208.43-1,317.85

Finding the Fourth Proportional to 2,142.07, 3,208.43 and 1,317.85

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Solution

The fourth proportional to 2,142.07, 3,208.43 and 1,317.85 is: 1,973.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.07 : 3,208.43 = 1,317.85 : x
  2. Step 2: Convert to fraction form
    2,142.07/3,208.43 = 1,317.85/x
  3. Step 3: Cross multiply
    2,142.07x = 3,208.43 × 1,317.85
  4. Step 4: Simplify right side
    2,142.07x = 4,228,224.75
  5. Step 5: Solve for x
    x = 4,228,224.75/2,142.07
  6. Step 6: Final answer
    x = 1,973.90

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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.