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Finding the Fourth Proportional to 2,911.56, 4,366.56 and 1,986.96

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Solution

The fourth proportional to 2,911.56, 4,366.56 and 1,986.96 is: 2,979.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.56 : 4,366.56 = 1,986.96 : x
  2. Step 2: Convert to fraction form
    2,911.56/4,366.56 = 1,986.96/x
  3. Step 3: Cross multiply
    2,911.56x = 4,366.56 × 1,986.96
  4. Step 4: Simplify right side
    2,911.56x = 8,676,180.06
  5. Step 5: Solve for x
    x = 8,676,180.06/2,911.56
  6. Step 6: Final answer
    x = 2,979.91

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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.