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Finding the Fourth Proportional to 5,210.68, 7,821.90 and 2,744.92

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Solution

The fourth proportional to 5,210.68, 7,821.90 and 2,744.92 is: 4,120.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,210.68 : 7,821.90 = 2,744.92 : x
  2. Step 2: Convert to fraction form
    5,210.68/7,821.90 = 2,744.92/x
  3. Step 3: Cross multiply
    5,210.68x = 7,821.90 × 2,744.92
  4. Step 4: Simplify right side
    5,210.68x = 21,470,489.75
  5. Step 5: Solve for x
    x = 21,470,489.75/5,210.68
  6. Step 6: Final answer
    x = 4,120.48

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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.