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Finding the Fourth Proportional to 1,751.22, 2,627.28 and 518.68

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Solution

The fourth proportional to 1,751.22, 2,627.28 and 518.68 is: 778.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,751.22 : 2,627.28 = 518.68 : x
  2. Step 2: Convert to fraction form
    1,751.22/2,627.28 = 518.68/x
  3. Step 3: Cross multiply
    1,751.22x = 2,627.28 × 518.68
  4. Step 4: Simplify right side
    1,751.22x = 1,362,717.59
  5. Step 5: Solve for x
    x = 1,362,717.59/1,751.22
  6. Step 6: Final answer
    x = 778.15

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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.