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Finding the Fourth Proportional to 2,768.76, 3,821.12 and 1,590.21

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Solution

The fourth proportional to 2,768.76, 3,821.12 and 1,590.21 is: 2,194.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.76 : 3,821.12 = 1,590.21 : x
  2. Step 2: Convert to fraction form
    2,768.76/3,821.12 = 1,590.21/x
  3. Step 3: Cross multiply
    2,768.76x = 3,821.12 × 1,590.21
  4. Step 4: Simplify right side
    2,768.76x = 6,076,375.28
  5. Step 5: Solve for x
    x = 6,076,375.28/2,768.76
  6. Step 6: Final answer
    x = 2,194.62

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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.