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Finding the Fourth Proportional to 989.19, 1,365.09 and 596.29

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Solution

The fourth proportional to 989.19, 1,365.09 and 596.29 is: 822.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.19 : 1,365.09 = 596.29 : x
  2. Step 2: Convert to fraction form
    989.19/1,365.09 = 596.29/x
  3. Step 3: Cross multiply
    989.19x = 1,365.09 × 596.29
  4. Step 4: Simplify right side
    989.19x = 813,990.27
  5. Step 5: Solve for x
    x = 813,990.27/989.19
  6. Step 6: Final answer
    x = 822.88

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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.