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Finding the Fourth Proportional to 1,819.72, 2,729.58 and 451.72

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Solution

The fourth proportional to 1,819.72, 2,729.58 and 451.72 is: 677.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,819.72 : 2,729.58 = 451.72 : x
  2. Step 2: Convert to fraction form
    1,819.72/2,729.58 = 451.72/x
  3. Step 3: Cross multiply
    1,819.72x = 2,729.58 × 451.72
  4. Step 4: Simplify right side
    1,819.72x = 1,233,001.90
  5. Step 5: Solve for x
    x = 1,233,001.90/1,819.72
  6. Step 6: Final answer
    x = 677.58

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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.