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Finding the Fourth Proportional to 723.87, 998.89 and 404.83

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Solution

The fourth proportional to 723.87, 998.89 and 404.83 is: 558.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.87 : 998.89 = 404.83 : x
  2. Step 2: Convert to fraction form
    723.87/998.89 = 404.83/x
  3. Step 3: Cross multiply
    723.87x = 998.89 × 404.83
  4. Step 4: Simplify right side
    723.87x = 404,378.14
  5. Step 5: Solve for x
    x = 404,378.14/723.87
  6. Step 6: Final answer
    x = 558.64

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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.