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Finding the Fourth Proportional to 5,245.50, 7,866.81 and 1,959.90

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Solution

The fourth proportional to 5,245.50, 7,866.81 and 1,959.90 is: 2,939.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,245.50 : 7,866.81 = 1,959.90 : x
  2. Step 2: Convert to fraction form
    5,245.50/7,866.81 = 1,959.90/x
  3. Step 3: Cross multiply
    5,245.50x = 7,866.81 × 1,959.90
  4. Step 4: Simplify right side
    5,245.50x = 15,418,160.92
  5. Step 5: Solve for x
    x = 15,418,160.92/5,245.50
  6. Step 6: Final answer
    x = 2,939.31

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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.