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Finding the Fourth Proportional to 1,809.92, 2,714.44 and 769.95

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Solution

The fourth proportional to 1,809.92, 2,714.44 and 769.95 is: 1,154.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,809.92 : 2,714.44 = 769.95 : x
  2. Step 2: Convert to fraction form
    1,809.92/2,714.44 = 769.95/x
  3. Step 3: Cross multiply
    1,809.92x = 2,714.44 × 769.95
  4. Step 4: Simplify right side
    1,809.92x = 2,089,983.08
  5. Step 5: Solve for x
    x = 2,089,983.08/1,809.92
  6. Step 6: Final answer
    x = 1,154.74

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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.