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Finding the Fourth Proportional to 2,659.16, 3,988.94 and 711.32

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Solution

The fourth proportional to 2,659.16, 3,988.94 and 711.32 is: 1,067.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,659.16 : 3,988.94 = 711.32 : x
  2. Step 2: Convert to fraction form
    2,659.16/3,988.94 = 711.32/x
  3. Step 3: Cross multiply
    2,659.16x = 3,988.94 × 711.32
  4. Step 4: Simplify right side
    2,659.16x = 2,837,412.80
  5. Step 5: Solve for x
    x = 2,837,412.80/2,659.16
  6. Step 6: Final answer
    x = 1,067.03

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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.