Home / 2,172.36-3,258.37-691.52

Finding the Fourth Proportional to 2,172.36, 3,258.37 and 691.52

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Solution

The fourth proportional to 2,172.36, 3,258.37 and 691.52 is: 1,037.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.36 : 3,258.37 = 691.52 : x
  2. Step 2: Convert to fraction form
    2,172.36/3,258.37 = 691.52/x
  3. Step 3: Cross multiply
    2,172.36x = 3,258.37 × 691.52
  4. Step 4: Simplify right side
    2,172.36x = 2,253,228.02
  5. Step 5: Solve for x
    x = 2,253,228.02/2,172.36
  6. Step 6: Final answer
    x = 1,037.23

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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.