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Finding the Fourth Proportional to 723.64, 998.66 and 443.79

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Solution

The fourth proportional to 723.64, 998.66 and 443.79 is: 612.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.64 : 998.66 = 443.79 : x
  2. Step 2: Convert to fraction form
    723.64/998.66 = 443.79/x
  3. Step 3: Cross multiply
    723.64x = 998.66 × 443.79
  4. Step 4: Simplify right side
    723.64x = 443,195.32
  5. Step 5: Solve for x
    x = 443,195.32/723.64
  6. Step 6: Final answer
    x = 612.45

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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.