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Finding the Fourth Proportional to 2,659.05, 3,988.85 and 711.45

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Solution

The fourth proportional to 2,659.05, 3,988.85 and 711.45 is: 1,067.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,659.05 : 3,988.85 = 711.45 : x
  2. Step 2: Convert to fraction form
    2,659.05/3,988.85 = 711.45/x
  3. Step 3: Cross multiply
    2,659.05x = 3,988.85 × 711.45
  4. Step 4: Simplify right side
    2,659.05x = 2,837,863.78
  5. Step 5: Solve for x
    x = 2,837,863.78/2,659.05
  6. Step 6: Final answer
    x = 1,067.25

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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.