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Finding the Fourth Proportional to 724.09, 1,083.39 and 619.96

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Solution

The fourth proportional to 724.09, 1,083.39 and 619.96 is: 927.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.09 : 1,083.39 = 619.96 : x
  2. Step 2: Convert to fraction form
    724.09/1,083.39 = 619.96/x
  3. Step 3: Cross multiply
    724.09x = 1,083.39 × 619.96
  4. Step 4: Simplify right side
    724.09x = 671,658.46
  5. Step 5: Solve for x
    x = 671,658.46/724.09
  6. Step 6: Final answer
    x = 927.59

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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.