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Finding the Fourth Proportional to 989.38, 1,365.33 and 596.62

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Solution

The fourth proportional to 989.38, 1,365.33 and 596.62 is: 823.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.38 : 1,365.33 = 596.62 : x
  2. Step 2: Convert to fraction form
    989.38/1,365.33 = 596.62/x
  3. Step 3: Cross multiply
    989.38x = 1,365.33 × 596.62
  4. Step 4: Simplify right side
    989.38x = 814,583.18
  5. Step 5: Solve for x
    x = 814,583.18/989.38
  6. Step 6: Final answer
    x = 823.33

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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.