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Finding the Fourth Proportional to 1,751.43, 2,627.31 and 518.85

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Solution

The fourth proportional to 1,751.43, 2,627.31 and 518.85 is: 778.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,751.43 : 2,627.31 = 518.85 : x
  2. Step 2: Convert to fraction form
    1,751.43/2,627.31 = 518.85/x
  3. Step 3: Cross multiply
    1,751.43x = 2,627.31 × 518.85
  4. Step 4: Simplify right side
    1,751.43x = 1,363,179.79
  5. Step 5: Solve for x
    x = 1,363,179.79/1,751.43
  6. Step 6: Final answer
    x = 778.32

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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.