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Finding the Fourth Proportional to 983.45, 1,476.09 and 496.85

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Solution

The fourth proportional to 983.45, 1,476.09 and 496.85 is: 745.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.45 : 1,476.09 = 496.85 : x
  2. Step 2: Convert to fraction form
    983.45/1,476.09 = 496.85/x
  3. Step 3: Cross multiply
    983.45x = 1,476.09 × 496.85
  4. Step 4: Simplify right side
    983.45x = 733,387.94
  5. Step 5: Solve for x
    x = 733,387.94/983.45
  6. Step 6: Final answer
    x = 745.73

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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.