Home / 2,987.52-4,122.68-1,661.28

Finding the Fourth Proportional to 2,987.52, 4,122.68 and 1,661.28

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Solution

The fourth proportional to 2,987.52, 4,122.68 and 1,661.28 is: 2,292.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.52 : 4,122.68 = 1,661.28 : x
  2. Step 2: Convert to fraction form
    2,987.52/4,122.68 = 1,661.28/x
  3. Step 3: Cross multiply
    2,987.52x = 4,122.68 × 1,661.28
  4. Step 4: Simplify right side
    2,987.52x = 6,848,917.52
  5. Step 5: Solve for x
    x = 6,848,917.52/2,987.52
  6. Step 6: Final answer
    x = 2,292.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.