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Finding the Fourth Proportional to 2,405.60, 3,608.60 and 762.10

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Solution

The fourth proportional to 2,405.60, 3,608.60 and 762.10 is: 1,143.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,405.60 : 3,608.60 = 762.10 : x
  2. Step 2: Convert to fraction form
    2,405.60/3,608.60 = 762.10/x
  3. Step 3: Cross multiply
    2,405.60x = 3,608.60 × 762.10
  4. Step 4: Simplify right side
    2,405.60x = 2,750,114.06
  5. Step 5: Solve for x
    x = 2,750,114.06/2,405.60
  6. Step 6: Final answer
    x = 1,143.21

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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.