Home / 2,172.08-3,258.29-711.38

Finding the Fourth Proportional to 2,172.08, 3,258.29 and 711.38

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Solution

The fourth proportional to 2,172.08, 3,258.29 and 711.38 is: 1,067.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.08 : 3,258.29 = 711.38 : x
  2. Step 2: Convert to fraction form
    2,172.08/3,258.29 = 711.38/x
  3. Step 3: Cross multiply
    2,172.08x = 3,258.29 × 711.38
  4. Step 4: Simplify right side
    2,172.08x = 2,317,892.26
  5. Step 5: Solve for x
    x = 2,317,892.26/2,172.08
  6. Step 6: Final answer
    x = 1,067.13

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1.5x scale

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.