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Finding the Fourth Proportional to 1,760.15, 2,639.43 and 663.74

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Solution

The fourth proportional to 1,760.15, 2,639.43 and 663.74 is: 995.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,760.15 : 2,639.43 = 663.74 : x
  2. Step 2: Convert to fraction form
    1,760.15/2,639.43 = 663.74/x
  3. Step 3: Cross multiply
    1,760.15x = 2,639.43 × 663.74
  4. Step 4: Simplify right side
    1,760.15x = 1,751,891.97
  5. Step 5: Solve for x
    x = 1,751,891.97/1,760.15
  6. Step 6: Final answer
    x = 995.31

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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.