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Finding the Fourth Proportional to 2,615.47, 3,609.29 and 1,620.99

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Solution

The fourth proportional to 2,615.47, 3,609.29 and 1,620.99 is: 2,236.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,615.47 : 3,609.29 = 1,620.99 : x
  2. Step 2: Convert to fraction form
    2,615.47/3,609.29 = 1,620.99/x
  3. Step 3: Cross multiply
    2,615.47x = 3,609.29 × 1,620.99
  4. Step 4: Simplify right side
    2,615.47x = 5,850,627.05
  5. Step 5: Solve for x
    x = 5,850,627.05/2,615.47
  6. Step 6: Final answer
    x = 2,236.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.