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Finding the Fourth Proportional to 2,659.69, 3,988.71 and 711.64

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Solution

The fourth proportional to 2,659.69, 3,988.71 and 711.64 is: 1,067.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,659.69 : 3,988.71 = 711.64 : x
  2. Step 2: Convert to fraction form
    2,659.69/3,988.71 = 711.64/x
  3. Step 3: Cross multiply
    2,659.69x = 3,988.71 × 711.64
  4. Step 4: Simplify right side
    2,659.69x = 2,838,525.58
  5. Step 5: Solve for x
    x = 2,838,525.58/2,659.69
  6. Step 6: Final answer
    x = 1,067.24

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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.