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Finding the Fourth Proportional to 1,629.60, 2,440.96 and 763.36

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Solution

The fourth proportional to 1,629.60, 2,440.96 and 763.36 is: 1,143.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,629.60 : 2,440.96 = 763.36 : x
  2. Step 2: Convert to fraction form
    1,629.60/2,440.96 = 763.36/x
  3. Step 3: Cross multiply
    1,629.60x = 2,440.96 × 763.36
  4. Step 4: Simplify right side
    1,629.60x = 1,863,331.23
  5. Step 5: Solve for x
    x = 1,863,331.23/1,629.60
  6. Step 6: Final answer
    x = 1,143.43

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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.