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Finding the Fourth Proportional to 2,172.36, 3,258.84 and 711.66

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Solution

The fourth proportional to 2,172.36, 3,258.84 and 711.66 is: 1,067.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.36 : 3,258.84 = 711.66 : x
  2. Step 2: Convert to fraction form
    2,172.36/3,258.84 = 711.66/x
  3. Step 3: Cross multiply
    2,172.36x = 3,258.84 × 711.66
  4. Step 4: Simplify right side
    2,172.36x = 2,319,186.07
  5. Step 5: Solve for x
    x = 2,319,186.07/2,172.36
  6. Step 6: Final answer
    x = 1,067.59

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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.