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Finding the Fourth Proportional to 1,351.83, 2,027.04 and 620.78

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Solution

The fourth proportional to 1,351.83, 2,027.04 and 620.78 is: 930.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.83 : 2,027.04 = 620.78 : x
  2. Step 2: Convert to fraction form
    1,351.83/2,027.04 = 620.78/x
  3. Step 3: Cross multiply
    1,351.83x = 2,027.04 × 620.78
  4. Step 4: Simplify right side
    1,351.83x = 1,258,335.76
  5. Step 5: Solve for x
    x = 1,258,335.76/1,351.83
  6. Step 6: Final answer
    x = 930.84

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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.