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Finding the Fourth Proportional to 2,770.20, 3,821.18 and 1,721.25

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Solution

The fourth proportional to 2,770.20, 3,821.18 and 1,721.25 is: 2,374.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,770.20 : 3,821.18 = 1,721.25 : x
  2. Step 2: Convert to fraction form
    2,770.20/3,821.18 = 1,721.25/x
  3. Step 3: Cross multiply
    2,770.20x = 3,821.18 × 1,721.25
  4. Step 4: Simplify right side
    2,770.20x = 6,577,197.47
  5. Step 5: Solve for x
    x = 6,577,197.47/2,770.20
  6. Step 6: Final answer
    x = 2,374.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.