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Finding the Fourth Proportional to 3,976.72, 5,965.36 and 1,055

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Solution

The fourth proportional to 3,976.72, 5,965.36 and 1,055 is: 1,582.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,976.72 : 5,965.36 = 1,055 : x
  2. Step 2: Convert to fraction form
    3,976.72/5,965.36 = 1,055/x
  3. Step 3: Cross multiply
    3,976.72x = 5,965.36 × 1,055
  4. Step 4: Simplify right side
    3,976.72x = 6,293,454.80
  5. Step 5: Solve for x
    x = 6,293,454.80/3,976.72
  6. Step 6: Final answer
    x = 1,582.57

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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.