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Finding the Fourth Proportional to 1,751.42, 2,626.90 and 518.60

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Solution

The fourth proportional to 1,751.42, 2,626.90 and 518.60 is: 777.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,751.42 : 2,626.90 = 518.60 : x
  2. Step 2: Convert to fraction form
    1,751.42/2,626.90 = 518.60/x
  3. Step 3: Cross multiply
    1,751.42x = 2,626.90 × 518.60
  4. Step 4: Simplify right side
    1,751.42x = 1,362,315.61
  5. Step 5: Solve for x
    x = 1,362,315.61/1,751.42
  6. Step 6: Final answer
    x = 777.83

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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.