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Finding the Fourth Proportional to 2,405.52, 3,608.26 and 762.20

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Solution

The fourth proportional to 2,405.52, 3,608.26 and 762.20 is: 1,143.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,405.52 : 3,608.26 = 762.20 : x
  2. Step 2: Convert to fraction form
    2,405.52/3,608.26 = 762.20/x
  3. Step 3: Cross multiply
    2,405.52x = 3,608.26 × 762.20
  4. Step 4: Simplify right side
    2,405.52x = 2,750,215.77
  5. Step 5: Solve for x
    x = 2,750,215.77/2,405.52
  6. Step 6: Final answer
    x = 1,143.29

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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.