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Finding the Fourth Proportional to 2,642.03, 3,960.73 and 999.73

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Solution

The fourth proportional to 2,642.03, 3,960.73 and 999.73 is: 1,498.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,642.03 : 3,960.73 = 999.73 : x
  2. Step 2: Convert to fraction form
    2,642.03/3,960.73 = 999.73/x
  3. Step 3: Cross multiply
    2,642.03x = 3,960.73 × 999.73
  4. Step 4: Simplify right side
    2,642.03x = 3,959,660.60
  5. Step 5: Solve for x
    x = 3,959,660.60/2,642.03
  6. Step 6: Final answer
    x = 1,498.72

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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.