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Finding the Fourth Proportional to 723.39, 1,083.78 and 333.72

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Solution

The fourth proportional to 723.39, 1,083.78 and 333.72 is: 499.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.39 : 1,083.78 = 333.72 : x
  2. Step 2: Convert to fraction form
    723.39/1,083.78 = 333.72/x
  3. Step 3: Cross multiply
    723.39x = 1,083.78 × 333.72
  4. Step 4: Simplify right side
    723.39x = 361,679.06
  5. Step 5: Solve for x
    x = 361,679.06/723.39
  6. Step 6: Final answer
    x = 499.98

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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.